Philatelic expert marks by names M to R. Perito filatelico.

NAMES M–R

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Names A–F, Names G–L, Names S–Z, Stamp Forgery Guide,
Areas A–E, Areas F–G, Areas H–R, Areas S–Z, First names.

Signature	Expertizing area	Details (b. born, d. dead, f. founded)
m (large size, 4x3 mm)	Crete (Therison)	Seen on genuine, original Therison stamps
M + Sz ('M/cross/Sz')	Hungary	Hungarian Philatelic Federation, 1926–
Mærket er ægte men, ureglementeret afstemplet	Greenland (parcel stamps)	Danish for: "The stamp is genuine but cancelled contrary to regulations".
Macdonnell, David	Ireland	Dublin, b. 1954, expert 1981–, AIEP 2001–, [FFE5 6, PE]
Macoveanu, P., 2	Europe	Paris 1956, 1990s. Note
Macudziński, Viktor	Germany East	.
Madame Joseph Forged Cancel (boxed, in green). Note	Br. Colonies	Applied by Stanley Gibbons Ltd to stamps with forged postmark, c. 2000–
Madarasz, Jules (= Gyula)	Hungary	Budapest, 1900–81, AIEP 1970–81
Mahé, Pierre-Marie	France	Paris, 1833–1913
Mahr, Max (forged)	Czechoslovakia, Slovakia, Bohemia & Moravia, Sudetians	Düsseldorf, b. 1917, BPP 1976, AIEP 1979–92
Maier, Jörg. Certif.	Chile (incl. occ. of Peru)	Bubenreuth, Munich, b. 1940, expert 1980–, BPP 1980–, AIEP 1991–, [FFE3, PE]
Maier Berlin, M. Kurt (very small size), 2	Germany and States, Hungary etc.	Michael Kurt M., Berlin, 1885–1949, dealer, expert –1931
Maigatter, Lutz	Germany East (Bezirk 1948)	Viersen, BPP 1991–2008
Maisel, Bill	USA, BNA, Br. Colonies	Profess. Stamp Experts 2000
Majer	Czechoslovakia	.
Majörg, Karl	Austria (post-1945 postal history)	Wartberg a.d.K. (Austria) 2001, VÖB
Majoros, Laszlo	Hungary (Sopron 1956)	Budapest 2001
Majs, Sándor	Hungary	Budapest, dealer, [Flasch]
Mák	Rumania (Regatul)	[Flasch]
Maka, Zdzislaw	Poland (1944–)
Malecek, Jaroslav (in script)	Czechoslovakia (Hradcin issue)	Prague, b. 1940, SCF 2001
Mandel, Frank	USA, BNA, Br. Colonies	Profess. Stamp Experts 2000
Mandrovski, Nicolai	Russia, Soviet Union	Russia, b. 1945, AIEP 1997–99, frequently on forged
Mangold, Otto	Portugal and Colonies	Frankfurt a.M. 1897
Mansfeld, Kurt. Certif.	German Colonies	Bad Kreuznach, BPP 1958–
Mantow (Mantau), Sophie ('S.M.')	Europe	Berlin 1905, dealer. Advert.
Mantke	Switzerland	.
Mar..., Erkki	Worldwide	Mikkeli (Finland), collector
Marbach, 2, or 'L. Marbach Wien II'	Hungary, Russia	Leopold (?) M., Vienna, dealer. Note
Marcel c.at Anvers	Latin America	Forged, also on forged
Marchand, André	.	France, 1916–97, AIEP 1970–75
Marchand, G.	France	Paris 1949, dealer
Marchand, Jean-Claude. Certif.	Switzerland	Geneva, b. 1960, dealer, expert 1981–, SBPV 1984–, AIEP 1994–, BPP 1991, [FFE4, PE]
Marco, Martin	Rumania, Turkey (Levant), Israel	Tel Aviv, b. 1911, dealer, expert 1948–, AIEP 1981–, [FFE5]
Marconnet, M.	France and Colonies	Nancy 1897
Marcus, M. H. Advert.	Turkey	Istanbul 1905, dealer
Mareš (Mares)	Czechoslovakia	Czechoslovakia, pre-WW2
Maresch, Wilhelm H. P.	Canada, BNA	Toronto, b. 1926, dealer, expert 1956–, AIEP 1976–c.2006, [FFE3, PE]
Margue, Claude	France and Colonies	Paris, AIEP 1964–87
Marimian	Br. Colonies, Worldwide?	British dealer?
Marinšek, Aleš	Yugoslavia (see note)	Ljubljana. Note
Marjanovic (script, 2 ver.). Certif.	Yugoslavia	Yugoslavia, expert c. 1960–
Markovits, Robert L.	USA, BNA, Br. Colonies	Profess. Stamp Experts 2000
Markstein, József	Hungary (air mails)	Budapest, expert comm. chairm.
Marmo, Vladi	Finland (Zeppelin)	Helsinki, 1914–69
Marque Garantie – Soc Mis –	Hungary (on all 16 Nov. 1919 ovpt.s; see cat.s)	Genuine mark is in same colour as stamp
Margue, Léon-Pierre	France and Colonies, Europe	See Miró, Léon
Marquelet	French Colonies	France?, dealer
Marriott, Sir John B(rook)	.	Guildford (GB), 1922–2001, RPSL Expert Committee 1965–, AIEP 1986–2000
Martin, Col. D. R. (manuscript)	Pakistan (ovpt on India)	Great Britain
Martin, Felix	Germany (air mails)	Chemnitz 1950 1961, 1890–c.1956, AIEP 1956–c.56
Martinaš, Ivan	Fiume	Rijeka 2007. Note
Martinkovic, J.	Yugoslavia (SHS)	Zagreb, Federation Chairman
Marx, Dr.	German States	.
Marxer, Peter. Certif.	Liechtenstein	Vaduz, SBPV 1988–, BPP 1990–2013
Marziano, Pascal. Certif.	France (modern specialities 1940–)	Cap d'Ail (F) 2007, ASPPI. Note
Massah, R. (in manuscript)	Samos	.
Mathà, Dr. Thomas	Italy (postal history: Roman States, Trieste)	Girlan (I), b. 1972, expert 1999–, AIEP 2005–
Matheisen, Karl-Heinz	Memel	Neuss, BPP 1984
Matl, Albert, 2. Certif.	Austria (incl. PO Levant and Crete), Lombardy-Venetia, Turkey, Japan	Vienna, b. 1924, expert 1963–, BPP 1976, AIEP 1964–, VÖB, [FFE5, PE]
Matsumoto, Jun Ichi	Japan and areas	Japan, ECPM (q.v.) 2001
Mattila, Esa	Finland (preadhesive postal history)	Espoo, Finn. Phil. Fed. 2009–2011
Matz, Billy. BM	CSA, USA (Tennessee postal history)	USA 2000
Maury, Arthur (in manuscript). Picture	Worldwide	Paris, 1844–1907, dealer, also a company f. 1860 (cf. Lemaire), [Tyler]
Maus, Julius	Ionian Is.	Baden-Baden 1935, 1855–1935
Mavrogordato, Pierre (Peter)	Russian PO Levant	Römhild 1936, Vienna, Lausanne 1926, 1870–1948, exhibitor. Note
May, U.	German States (Bavaria)	.
Mayer	Hungary (Debrecen)	Also on forged, [Flasch]
Mayer, Friedrich	Yugoslavia (1918–29)	Munich-Pasing 1961, expert 1950–, BPP 1958–
Mayer, Henry	Germany East	Uelzen, b. 1964, BPP 1998–
Mayer, Max J.	Japan (excl. occ.s)	Munich, Obergünzburg, BPP 1977–97
Mayer, Stephan, Dr.	Austria (cancellations)	Vienna 1928
Mayer, O.	Rumania occ. Kolomyya etc.	Vienna, dealer
Mazepa, James	Ukraine	USA, collector's mark, UPNS
Mazo, Jorge S. del	Argentina	Buenos Aires, 1899–1982, AIEP 1971–82
Mazurek, F. J.	Czechoslovakia	Owner's/dealer's mark, Polish? [P.Hoffm.]
MDR	Japanese occ. (all territories)	See Rowell
Medcalf, Don	USA, BNA, Br. Colonies	Profess. Stamp Experts 2000
Mefesz Sopron, cf. MF	Hungary (Sopron 1956)	Students' league, [Flasch 17, 117]
Megyeri, Ferenc ('MF' in circle)	Rumania (Regatul), Hungary (Debrecen)	Oradea, [Flasch 118]
Mehlmann, Volker	German States (NDP and Alsace-Lorraine)	Dormagen, BPP 1991
Meier, Heinrich	German States (Prussia)	Munich, b. 1928, BPP 1969–80
Meiners, Roland	German South West Africa	Cologne, BPP 2001
Meinertzhagen, Louis Ernest	France	London 1926, 1887–1941, RPS Expert Comm.
Melnikov, Leonid	Russia incl. pre-adh., Soviet Union	Moscow, 1936–2004, expert 1983–, AIEP 1997–2004, [FFE7, PE]
Membreño: see Duron M.
Mendelsohn Paris, B.	France and Colonies	Dealer?
Menge, Heinz	.	Dusseldorf, 1886–1595, BPP 1958–, AIEP 1954–59
Menzinsky, Dr. Georg. Photo	Finland, Sweden	Djursholm (Sweden) 1961, d. 1981
MEPSI. Certif.	Mexico	Mexico Elmhurst Phil. Soc. Int., USA
Meri G., Pedro A.	Venezuela	Caracas, Asofilca 2015
Merkel	Germany East	.
Merkur	Br. Guiana	1973
Merschkötter, Dr.	Germany (1945 locals)	.
Mertens	Great Britain	Two dealers in Brussels 1949
Mertes, Albert	Saar	Sulzbach (Saar) 1949. Note
Metzer	German States	.
Metzger, Steven	USA, BNA, Br. Colonies	Profess. Stamp Experts 2000
Mezzadri, R.	Italy and States	Rome, late 19th early 20th, dealer
Meyer, Bernd	Germany (Infla incl. Official)	Chemnitz 1991 2003, b. 1940, expert 1988–, BPP 1990–
Meyersburg, Robert B.	USA, BNA, Br. Colonies	Profess. Stamp Experts 2000
MF (in dotted circle), cf. Mefesz	Hungary (Sopron 1956)	.
MF (in full circle)	Rumania (Regatul), Hungary (Debrecen)	See Megyeri
MG	Russia (areas)	On forged
MHP	Mongolia	.
Michalsky	Malaya (Straits Settlements)	.
Michaux, Albert	Belgium	Auvelais (B), b. 1962, auctioneer, expert 1998–, AIEP 2003–, [FFE7, PE]
Michel ('Echt Hugo Michel Apolda'), 2 (1917). Advert.	Europe, Worldwide	Hugo Michel-Triller, Apolda 1910, Weimar 1917 1926, 1866–1944, dealer, cat. publisher/editor. Note
Michelsen, Dr. G.	Colombia, South America	Hamburg 1897
Micoulsky, Jean de	.	France, 1901–69, AIEP 1969
Miehe	French PO Levant, Transvaal	Dealer?
Mieländer, Gerhard	Estonia	Berlin-Britz 1961, BPP 1968
Miertl. Note (forgeries)	Hungary (Baranya)	Gyula (Julius) M., Pécs 1920, dealer, recogn. expert, [see Flasch 119]
Migliavacca, Dr. Giorgio. Note	Italy and areas, Br. Virgin Is., Iran (Persia), etc.	Tortola BVI, auctioneer 1967–, expert 1973–
Mihon ('sample, specimen')	Japan (on forged)	See Japan
Mikstein, S., mkstn (early mark); Mikstein (in script), 3. Note	Poland	Prof. Stanislaw M., Cracow, 1888–1956, expert c.1930–; forged (the one in script)
Mikulski, Zbigniew. Certif. The mark "Mikullski" is a forgery.	Poland, Russia incl. occ.s	St. Gallen (until 1964 Warsaw), b. 1925, expert 1951–, AIEP 1960–, VÖB 1982–, [FFE1 3 (p.178) 5, PE]
Milgram, James W., MD	USA, BNA, Br. Colonies	Profess. Stamp Experts 2000
Miltner, Milos	Czechoslovakia (Scout stamps)	Neuenhof (CH), 1980s, dealer
Minarik, Jan	Czechoslovakia	Prague, b. 1881, dealer –1931
Miranda de Mota, José Manuel	Portugal and Colonies	Póvoa de Varzim (PT), b. 1944, expert 1992–, AIEP c.2006–, Inexfip
Miró, Léon (Miro) (The trading name of Léon-Pierre Margue)	France and Colonies, Europe	Paris, 1894–c.1975, dealer c. 1930–65, AIEP 1968–75. Note
Mirza-Hadi	Iran (Persia)	See Hadi
Misteli, Prof. Charles	Switzerland (UN, Int. Org.)	Geneva 1950; collection is in the UN Geneva Postal Museum since 1962
Miszczak, Maciej	Poland	Wroclaw 2000, d. c.2005, Polish Fed.
MK	Hungary	[Flasch]
MK (in circle)	Czechoslovakia	[P. Hoffmann]
mkstn	Poland	See Mikstein
ML	Cuba	See Lazaro, Miguel
Möbs, Theodor. (= Moebs). Photo	Czechoslovakia, Bohemia & Moravia	Frankfurt/Main, 1897–1978, BPP 1958–, AIEP 1954–67
Modry, Dr. Fritz (forged), 2	Germany East (Bezirk 1948)	Wernigerode (DE), b. 1933, BPP 1991
Moeller, Carl Aage	Denmark, Greenland	See Møller
Moens, Jean-Baptiste	Worldwide	Brussels, 1833–1908, famous dealer, [Tyler]
Mogler, Gustav. Certif.	Germany (field post Mi 1–4)	Frankfurt/M., BPP 1984
Möhle, Heinz	German occ. Channel Is.	Hamburg, BPP 1976
Mohrmann, Edgar. Certif.	Scandinavia, Worldwide (pre-1900)	Hamburg 1943, 1897–1964, BPP 1961, AIEP 1954–64
Finland (pre-philately)	Moilanen, Atte	Helsinki 2024, Finn. Phil. Fed. 2024–
Mojaddedi ('M.S.M.')	Saudi Arabia	Mohammad Sadik Al-Mojaddedi, Djeddah
Mokuku ('forged')	Japan	See Japan
Moldenhauer jr, Frantz C.	Norway (excl. locals)	Minde (Norway), 1920–1999, dealer, expert c. 1965–90, AIEP 1970–99, BPP 1980
Molesworth, Jack E.	USA, BNA, Br. Colonies	Profess. Stamp Experts 2000
Møller, Carl Aage (Moller, Moeller). Certif.	Denmark, Schleswig-Holstein, Iceland, Greenland, Danish WI	Ebeltoft 2007–, Greve Strand (DK), b. 1956, expert 1986–, AIEP 2000–, BPP 2001, [FFE4 5, PE]
Monclús, Tomás	.	Barcelona, c.1890–c.1965, AIEP 1954–c.56
Mondolfo, Renato. Certif.	Italy and States, Trieste, Czechoslovakia, Europe	Trieste 1950, Rome 1961, 1918–92, AIEP 1954–92
Monge Pineda, Pedro	Spain and Colonies	Barcelona, 1890–1965, dealer, AIEP 1954–65. Note
Monkos, Henryk	Poland (groszy ovpt)	Swietochlowice 2008, Polish Fed.
Monori, Pavel	Hungary	Czechoslovakia, 1907–85, SCSF expert
Monteaux, Georges	France 1900–	Paris, AIEP 1970–90
Moorhouse, Brian. Certif.	South and Central America	Peterborough (GB) 2001, dealer
Morandi, Dr. Giancarlo	Italy (1945–)	Cremona, BPP 2003 ended 2007
Moratti M., Alberto	Venezuela	Caracas, Asofilca 2015
Morgoulis, Paul	Portugal and Colonies	Paris, c.1900–90, AIEP 1974–90
Moritz, Rud.	Malaya, Worldwide?	Frankfurt, dealer
Moscadelli, Franco. Certif.	Italy and areas	S. Miniato Basso, expert 84–. Note
Mosch, Semo	Rumania	Giurgiu pre-WW2, collector's advert.
Moschkau, Dr. Alfred	Worldwide	Germany, 1848–1912, expert 1871–77, [Brühl p.481]
Moser, Biel, F. (Moser-Räz), 2. Certif., 2	Switzerland	Fritz Moser-Räz, Biel (Switzerland), 1907–90, AIEP 1958–74
Moskauer Briefmarken-Sammler	Russia incl. Zemstvo and PO Levant, Finland, Poland	Moscow 1897, phil. society
Mosonyi	Rumania (Regatul)	Also on forged, [Flasch]
Mozek, Dr. Christian. Certif.	German States (Bergedorf; Vineta)	Willich, BPP 2001
Mozian, Vahan ('VM')	Armenia, Azerbaijan, Georgia	New York NY dealers/auctioneers Vahan Mozian Inc, 1901–c.1950, also on forged
Mozo ('imitation')	Japan (on forged)	See Japan
Mozu	France and Colonies, Portugal	.
MP (in circle)	Fiume, Hungary, Yugoslavia (locals)	On forged only, [Flasch 122]
MPC (in oval)	Cuba	See Museo Postal Cubano
Mrdja, Miodrag	Yugoslavia and areas	Belgrade 2004, Phil. Assoc. Serbia & M.
Mrnák, J (in script), (+forged, 2). Photo. (Mrnak)	Czechoslovakia	Jan Mrnák, Czechoslovakia, 1903–68, expert 1937–1940s, AIEP 1960–68
MS	Iran	See Sadri
MSM	Saudi Arabia	See Mojaddedi
Mueller, Edwin	Worldwide	See Müller
Muenz, Geo. H.	Palestine, Israel	See Müntz
Muis, C.	Netherlands and Colonies	Expert, d. c. 1990, NVPH/NVRH (Dutch Association of Stamp Dealers)
Müller (Muller, Mueller)	Iceland	.
Muller (Müller, Mueller)	Poland	Also on forged
Müller, Edwin (=Mueller). Photo. [See APS Hall of Fame.]	Europe, Austria (pre-1918, incl. PO Levant)	Vienna –1938, New York NY 1950, 1898–1962, expert 1935–, Friedl Expert Comm. NY, AIEP 1956–62
Muller, (Raymond) Frank	Worldwide (air mails)	Les Lilas, Royan (France), 1900–84, AIEP 1958–84
Müller, Hanfried (Muller, Mueller)	Germany (field post Mi 1 and Tunis)	Heidelberg, BPP 1991
Müller, Hans (Muller, Mueller)	Heligoland	Hannover 1897
Müller, Julius (Muller, Mueller)	Germany (1945–6 locals)	Berlin-Spandau, 1901–91?
Müller Leobschütz, Dr. Harry (in rectangle or in oval) (Muller)	Germany (Upper Silesia)	Leobschütz (Germany), 1878–1944, often on forged. Note
Müller, Milos (Muller, Mueller)	Czechoslovakia	Bratislava, expert 1939–1970s
Müller, Rolf Frieder (Muller, Mueller)	Germany East (Bezirk 1948)	Dresden, BPP 1991
Müller–Basel (Muller, Mueller)	.	Dealer Ernest M.? (t.a. Müller & Scheurer), Basel, pre-WW2
Müller-Mark, Ewald (Muller-Mark)	German States	Berlin-Lankwitz 1950, b. 1902
Munk, Dr. Herbert	(Fiume?)	Berlin, Lugano, 1875–1953, editor Kohl's Handbook
Müntz, Hans Georg (Muntz, Muentz)	Palestine, Israel	Tel Aviv, 1918–2002, expert 1965–2000, BPP 1978–90, AIEP 1978–2002, [FFE3 4]
Murray Payne Ltd	Br. Colonies (George VI)	Axbridge GB, experts Richard (Dickon) Pollard and Stuart Babbington
Museo Postal Cubano (M P C)	Cuba	La Habana
Mza-Hadi	Iran (Persia)	See Mirza-Hadi
N (in blue): shade of colour	Belgium and Colonies	See Soeteman, additional marks
Najjar, Abed H.	Jordan (Transjordan)	UK. Bibliographical note
Nakri, Yakup	Turkey	Istanbul, b. 1962, expert 1995–, AIEP 2003–, [FFE7, PE]
Narita, Hiromu	Japan	Japan, ECPM (q.v.) 2001
Narodnyi Komissariat ...	Russia	See HKBT
Nasmi	Turkey	.
Nauri (in script)	Turkey	See Nouri
Navarro Payá, Alfredo	Spain (postal forgeries)	Pontevedra, b. 1925, expert 1970–, AIEP 1978–, [FFE2 5, PE]
ND (in blue): genuine imperforate	Belgium and Colonies	See Soeteman, additional marks
ND (G.: Neudruck; Nachdruck)	Worldwide	Common mark for reprints
Nederl. Bond van Vereen. van Postzegelv.	Netherlands	Amsterdam 1950, (Dutch phil. federation)
Nederlandsche Postzegelveiling B.V. Certif.	Worldwide	Amsterdam 1979, auction house
Nederlandsche Vereeniging van Postzegelhandelaren. Certif.	Netherlands and Colonies	NVPH, The Hague, dealers' ass. expert committee
Neinken, Mortimer L.	USA	New York NY, 1896–1984, PF chairm.
Nekvasil, Jiri	Czechoslovakia (postal history)	Czechoslovakia, 1921–88, SCSF
Nemvalz, Valdo	Estonia	Johanneshov (Stockholm) 2001, 1922–2003, [Eesti Filatelist #39 p. 226]
neprodejné	(Czech for 'unsaleable')	(Strange use on a faultless stamp.)
neudruck	Worldwide	German for Reprint (not an exp. mark)
Neufeld	Austria	.
Neumann, Till. Certif., 2	German States (Bremen)	Bremen, b. 1972, dealer, BPP 1997–, AIEP 2004–, [FFE8]
Newiger, Dieter	Italy, Italian States (Sardinia), Japan (excl. occ.s)	Berlin, b. 1941, BPP 1991
Ney, Christine. Certif.	Saar (Mi 53– incl. Officials)	Saarwellingen, BPP 1991
Ney, Herbert	Saar (Mi 1–52)	Saarwellingen, BPP 2004–
NG	Hungary	Also on forged, [Flasch]
Nicolaides, N. S. (in script)	Greece	Greece?
Nickel, Jürgen	German States (Thurn & Taxis)	Nauen, BPP 1991
Nicklin, John W.	Armenia, Azerbaijan, Georgia	New York NY 1949, dealer, also on forged
Nielsen, Gunner Lundegaard	Denmark	Denmark 1969
Nielsen, Lasse. Certif.	Denmark, Europe	Copenhagen 1999, indep. expert. Note
Noël, Gilbert	France (cancellations)	Cathou (France), 1920–92, AIEP 1970–92
Norris, Andrew	Malaya	England 2003, BPA expert committee
Norsten, Karl-Arne; 'KAN'	Sweden (1920–36)	Stockholm 2008, dealer, active
North Western Army	Russia (NW Army)	On forged
Nouri, M.	Turkey	Istanbul-Stamboul, pre-WW2, dealer
Noury	Syria	Same as Nouri?
Novak, D.	Yugoslavia (ovpt. Bosnia and Slovenia)	Giessen, BPP 1991 –2004
Novak, Frantisek	Rumania	Czechoslovakia, 1897–1971, AIEP 1961–71, CSF 1960–
Novak, Roland	Germany (Bizone Bauten)	Giessen, BPP 1984
Novakovic, Dr. Brana ('H9' in circle)	Yugoslavia (WW2)	Expert of the Yugoslav Phil. Society c. 1977–90
Novotný, Ladislav (Novotny)	Czechoslovakia, Bohemia & Moravia	Bratislava, 1901–81, SCF 1957–
Nussbaum-Bisser, André. Certif.	Switzerland (1843–62)	Basel, 1908–88, BPP 1968, AIEP 1966–88
Nyáry, L.	Hungary	Budapest pre-WW2, ollector's advert.
Nykvist, Göran. Certif. Photo	Finland (postal stationery)	Kauniainen, 1932–2006, Finn. Ph. Fed. 1996–2006
Nyman, Arnold	France	Helsinki, 1916–2006, Finn. Phil. Fed. 1981–2004
O	Hungary	See Odor
OB (in blue): genuine cancellation	Belgium and Colonies	See Soeteman, additional marks
Obermüller, Franz	Sweden	Stockholm, 1906–85, dealer (Kihlströms Frimärkshandel, f. 1933), expert
Obermüller-Wilén, Dr. Helena (=Obermueller Wilen). Certif., 2	Sweden (1855–1919)	Huddinge (SE), b. 1942, expert 1985–, BPP 1994–, AIEP 1996–, [FFE2 3, PE]. Note
Odenweller, Robert P.	New Zealand, Samoa (pre-1900), (Australia) Tasmania	Barnardsville NJ, b. 1938, expert 1968–, AIEP 1980–, [FFE3, PE]
Odor, Johann/Jean (also 'O')	Hungary (ovpt), Rumania (Regatul), Russia (Armies), Ukraine	A forger, [Flasch 126]
Oechsner, Dr. Helmut P. Certif.	Germany (Infla incl. Official, Bavaria Infla, Germania issues), Danzig	Nuremberg, b. 1951, expert 1974–, BPP 1976, AIEP 1991–, [FFE3, PE]
Oertel, Dr.	Germany & Col., Heligoland, Albania, Croatia (1941–45)	.
Oesch, Herbert. Certif. Photo	Finland	Espoo, 1925–2006, Finn. Phil. Fed. 1981–2006
OFK	Norway	See Oslo Filatelist Klubb
Ohrt, Major Paul	German States (Oldenburg, Bremen), Worldwide (reprints)	Düsseldorf 1926, 1867–1944
Ohshima, Masaaki	Japan and areas	Japan, ECPM (q.v.) 2001
Okday, Ismail Hakki	Turkey	(One IHO: Istanbul, 1881–1977)
Olamo, Juhani (V.)	Finland, Ecuador	Helsinki, 1940–2010, Finn. Phil. Fed. 1981– 2001 2006–2010, AIEP 1998–2010, [FFE3, PE].
Oldrow, K., Exp.	Ukraine	Collector and expert, [UPNS]
Olendski, S., Riga	Ukraine	Riga, [UPNS]
Oliva, Bruno Savarese	Italy	See Savarese Oliva, Bruno
Oliva, Guglielmo. Certif.	Italy and States, San Marino, Ital. occ. Fiumano-Kupa, German occ. Ljubljana, Fiume, Albania, Spain (pre-1920)	Genoa 1949 1961, 1900–1969, dealer from 1920s, great expert, AIEP 1954–69
Oliveira Pinto, Fernando de	Portugal and areas	Portugal 2005, Inexfip member
Oliver, F(rank) H.	Greece, Heligoland, Luxemb., Worldwide	London 1926, b. 1867(66?), dealer, BPA expert
Oñate (Onate)	Spain	See Cajal Oñate
O'Neill, Fred	Costa Rica	Asoc. Filat. de C. R. 2001
Onofri, Mario. Certif.	Worldwide (Zeppelin)	Italy, 1895–1968, AIEP 1958–68
Opitz, Walter A. (forged)	German States (Prussia, Saxony, Thurn & Taxis)	Netzschkau 1920 1935 1950, Oberhöch- stadt/Taunus, 1877–1968, BPP 1958–, AIEP 1956–68
Oprysko, Modest M.	Ukraine	Baldwin Place NY 2001, UPNS expert
Orbán, Ferenc (Orban)	Hungary	Silkeborg (Denmark), 1924–98, AIEP 1981–84
Ora, F,	Italian Somaliland	?
Orenstein, Jonathan	USA, BNA, Br. Colonies	Profess. Stamp Experts 2000
Ores, J.	Poland (Cracow 1919)	Also on forged
Orestis Vlastos	Greece	See Vlastos
Oroszi, K.	Rumania (Regatul), Hungary (Western Hungary)	On genuine, [Flasch]
Orth, Dr. F. Alfred	Mongolia (pre-1945), Tibet	Bad Hersfeld (Germany), 1925–93, BPP 1980, AIEP 1983–93
Örvös, János ('JÖ' in triangle)	Hungary (esp. Debrecen I)	On genuine, [Flasch]
Ostara	Transvaal	Dealer?
Oslo Filatelist Klub (OFK)	Norway	Oslo 1950
Osper, Horst	Denmark, Danish WI, Faroes, Greenland, German occ. Sudetians	Borken (later Thailand), BPP 1991–2005
Ossa, Mikko (in manuscript)	Finland	Kokemäki (formerly of Turku), b. 1939, Finn. Phil. Fed. 1981–93. Note
OTW	Rumania (Regatul)	On genuine, [Flasch]
P, Cyrillic, in circle)	Ukraine 1918 (also 1992 ovpt)	See Pos, Gregory
Paaskesen, Erik E(gtved)	Denmark, Faroes, Danish West Indies	Brussels, 1949–2000, dealer, AIEP 1991–2000
Pacreu, E.	Spain	Barcelona, dealer
Paetow, Hans-Hermann	German occ.s Bohemia & Moravia and Poland (GG)	Bremen, b. 1931, expert 1990–, BPP 1996–2008, AIEP 2003–, [FFE7, PE]
Pagnoncelli, Ernesto. Certif.	Italy	Rome 1970s, dealer
Pahlman, Heikki	Finland (pre-philately)	Tampere, d. 2006, Finn. Phil. Fed. 1996–2006
PAK (lightly in pencil)	Confederate States	See Kaufmann, Patricia A.
Pákozdi, László (Pakozdi)	Hungary	Hungary, [Flasch 166]
Palacek, W.	Czechoslovakia	Prague
Palazolo, Jerry S.	Confederate States	USA 2000
Pape, Heinz. 2. Note (forged)	Hungary, Fiume, Rumania (Regatul), Yugoslavia (SHS)	Used by Géza Tarján, dealer, forger [Tyler, Flasch 130]
Pape, Herbert	Japan (excl. occ.s)	Erfurt, 1921–96, BPP 1991
Pappadopulo (in boxed P), SP (in circle). Stephan Aristol P.	Russia (Siberia), China	Vladivostok c. 1918–22, Shanghai 1923–48, 1880–1953 (b. 1885?), dealer. Note
Paprstein, Vladimir	Czechoslovakia	Czechoslovakia, d. 1958, USCF expert
Papuçcuoglu, Bülent (Papuccuoglu)	Turkey	Turkish Phil. Fed. 2001.
PAR	Cuba	See Robertson, Peter A.
Pardo, Flavio	Italy, Trieste	See San Giusto, Filatelia
Parras, Francisco	Cuba	.
Pascal ?	French Colonies	.
Pascanu, Leonard. Photo	Rumania (excl. Moldavia & Wallachia)	Bucuresti, b. 1952, expert 1985–, AIEP 1998–, [FFE3, PE]
Passer, Adolf	Turkey, Bosnia & Herzegovina	Prague, 1865–1938
Pataj Sándor	Hungary (Western Hungary)	An owner's mark, [Flasch]
Pátkai (Patkai)	Fiume	On genuine, [Flasch]
Pátkai (Patkai)	Fiume	On genuine, [Flasch]
Patoullan, R.	.	Paris
Pauligk, Dr. Karl. Certif.	German New Guinea (excl. GRI), German PO Morocco	Freiberg, BPP 1991
Pavoille (boxed, three lines: PA VOI LLE), also: Pavoille Paris (two lines)	France and Colonies, Hungary, Belgium	Emile P., Paris 1926, dealer, also on forged, [Flasch]
Payá (Paya)	Spain	See Navarro Payá
Pazout, Pavel	Czechoslovakia (1945–)	Praha, dealer (Profil), SCF 2001
Pearson, Patrick C. (Works as member of committee.)	Ceylon, Hong Kong, Iraq, W. Australia	London, b. 1930, expert 1965–, AIEP 1990–, [FFE1 3 5 6, PE]
Peinelt	Germany (incl. all areas)	Germany
Pelander, Carl E(inar)	Finland, Iceland, Scandinavia	New York NY, 1894–1966, dealer. Note
Pelczar, Piotr	Poland	Koszalin 2000 Leba 2008, Polish Fed.
Peleeheid Paris	Brazil	Paris, dealer?
Peltonen, Lauri ('LaPe')	Finland	Hanko (Finland), dealer, in use 1930s
Pemberton, Edward L(oines)	Worldwide	England, 1844–78.
Pemberton, Percival Loines	Greece, Worldwide	London, 1875–1949, BPA expert, son of E.L.
Penning, Dr. Hans-Karl. Photo (3rd fr. left, at right Firma Köhler repr.), 2	Germany (1945–6 certain locals)	Bornheim, b. 1941, BPP 1981–, [FFE6]
Peoples, Dennis	USA, BNA, Br. Colonies	Profess. Stamp Experts 2000
Perrain, A. R.	Russia (areas), Hungary (on forged ovpt)	France, dealer, [Flasch 137]
Perzynski, Maciej S.	.	Poland, 1907–77, AIEP 1961–77
PESA	Worldwide	Philatelic Expertizing Service of America Inc., 1984 (12 mo.), APS, ASDA, GPS
Peschl, Eduard (forged; the first), 2	Germany (Germania issues, 1915–45 incl. Infla)	Passau 1950, 1903–99, BPP 1961, AIEP 1954–95
Peters, Herm.	German States (Mecklenburg-Schwerin)	Bremen 1897
Peters, Markus W. E.	Albania	Göppingen-Hohenstaufen, b. 1968, expert 1994–, AIEP 2002–, [FFE6, PE]
Peters, Oskar Erich, 'O.E.P.', trident	Ukraine	Rabenstein 1950, Chemnitz 1920 1961, b. 1884, 1920s expert, UPV
Petersen, Dr. E. N. (forged)	Memel	Neunkirchen-Seelscheid, BPP 1976
Petric, Nicola	Yugoslavia, Fiume, Hungary (Baranya)	Zagreb 1999. Also on forged
Petriuk, Stefan	Poland incl. locals and Polish Corps	Langballigholz, BPP 1991, Polish Fed.
Petrocelli, David	France	New York NY 2001
Petrovic, Bogdan	Yugoslavia and areas	Belgrade 2004, Phil. Assoc. Serbia & M.
Petry, Claus	Germany (Mi 31–52, Field Post 17)	Hamburg, b. 1965, BPP 1996
Pettersson, Olle	Sweden	Stockholm, dealer
Petzold, Volkmar	Germany East (Bezirk 1948)	Dresden, DDR expert 1985–1990, BPP 1990–2005
PF. Certif.	USA, Central America, South America, Worldwide	Philatelic Foundation, NY, 1945–, [FFE2 (p.173) 3, PE]. Note
Pfä. [German: Postfälschung]	Worldwide, especially German area	On postal forgeries in addition to name
Pfaff, C.	German states	Hannover 1897
Pfalz, Dr. R.	.	VÖB honorary member
Pfeiffer, Detlef	German occ. Poland (GG), Bohemia-M.	Gäufelden-Öschelbronn, BPP 2001
Pfenninger, Franz (forged, another forged). Certif.	Germany incl. States (esp. Bavaria) and Colonies, France, French Colonies (–1886), Europe (–1900), Egypt, Sudan, Japan, Worldwide (–1900)	Munich 1950, 1905–86, BPP 1958–, AIEP 1954–86
PFSA	South Africa, Worldwide	Philatelic Federation of South Africa
PhA USSR (within an 'S')	Russia (and areas), Soviet Union	See Soviet Philatelic Association
PhB (cf. ürményi)	Hungary (Debrecen)	See Banater Philatelist
Philatelia Krakow	Poland (Cracow 1919), Ukraine	Cracow pre-WW2, dealers. Mostly on forged [Stallberg]
Philatelia Subotica, 2	Hungary, Yugoslavia (SHS)	Szabadka, dealer, on genuine, [Flasch]
Philatelic Museum	Japan and occ.s, Manchukuo	Tokyo 2005, Expert Committee. Note
Philatella Dortmund	Ukraine	Germany, also on forged
Phillips, David G.	USA, BNA, Br. Colonies	Profess. Stamp Experts 2000
Pickenpack, Werner (forged, forged)	Germany (field post and occ. France & Ukraine)	Hamburg, BPP 1961
Piechotte, Max ('P.X.M.')	Germany and States	Berlin, dealer or collector mark
Piekut, Janusz Zbigniew	Poland	Warsaw 2000, Polish Fed. –c.2005
Pieper, Dr. Hans	Worldwide (telegraph)	Kirchheim, BPP 1976
Pietilä, Juhani	Finland (postal stationery)	Turku, b. 1941, Finn. Phil. Fed. 1990–2021
Pietz, Friedrich	German States (Bavaria pre-adh.)	Nuremberg, BPP 2001
Pigeron, Xavier	France	Paris 2002, dealer 1964–
Pileur, Jacques Le	France	Paris 1943, 1880–1969. Note
Piller, Stanley M.	USA, BNA, Br. Colonies	Profess. Stamp Experts 2000
Pimian, I. V. (?)	Luxembourg	.
Pinchot, S.	Worldwide	1980s
Pineda, Pedro Monge	Spain and Colonies	See Monge, Pedro Pineda
Pirl, Dr. P. H., 2 (Paul H. Pirl)	Russia, Heligoland, Iran (Persia), Japan, Transvaal, Worldwide	Berlin-Charlottenburg 1935, 1873–1947, expert since very early 1900
Pit, D. M. (in square)	Yugoslavia	.
Pitkänen (Pitkanen), Risto	Finland (old cancellations only)	Kuopio, Finn. Phil. Fed. 2007–
Pittermann, Pavel. Photo	Czechoslovakia, Bohemia & Moravia, Slovakia. Also on forged	Prague, b. 1942, expert 1984–, CSF exp. chairman –2004, AIEP 1996–, [FFE2 3, PE]
PJB (Postás Jóléti Bizottság)	Hungary (coronation of Charles IV stamps)	Post Charity Committee; on front of stamp
Plamsch, Adolf	Central Lithuania, Russia (Wenden)	Grodno 1935, b. 1866
PLC	Armenia, Azerbaijan, Georgia	Also on forged.
Plško, Štefan (Plsko)	Denmark, Danish WI	Detva (Slovakia), SCF 2001
PM (or MP?, monogram)	Samoa, Australia (Queensland)	On genuine and on forged
PN (in oval)	Fiume, Hungary (ovpt)	On forged, [Flasch]
Poburenny, Stefan, 'PS'. Note	Western Ukraine, Russia etc.	PO civil servant in W. Ukraine, on forged
Podlog (etc. beginning with 'Pod...')	(in Cyrillic letters)	Russian for 'Forgery'
Pofis, 2, Pofis-Beneš	Czechoslovakia, Bohemia & Moravia	See Beneš
Pohl, Waldemar (Woldemar?)	Russia (incl. Armies and PO abroad), Estonia, Ukraine, Armenia (excl. Z- & monogr. ovpt), Azerbaijan, Georgia, Batum	Bamberg 1950, 1903–69, BPP 1961, generally reliable, also on forged
Pollard, Richard (Dickon)	Br. Colonies (George VI)	England 2001, dealer (see Murray Payne), BPA expert committee member
Pollmer, Dr. Gottfried	Germany (1945 Meissen local)	Meissen, BPP 1991
Ponsio, Ilmari ('IP'). Photo	Finland	Tampere, dealer, in use 1930s
Poon, Kam Leung. Photo. (Works as member of committee.)	China incl. all areas, Hong Kong, Macau, Taiwan (Formosa)	Hong Kong, b. 1936, expert 1995–, AIEP 2000–, [FFE4, PE]
Popa, S. Andreas	Danzig	Schleswig 1950
Popielewski, Lech	Poland	Torun 2000, d. c.2005, Polish Fed.
Poppers	Ukraine	.
Popoff	Ukraine	Kyiv, later Moscow, collector
Pordo, Friedrich	Brazil	Rio de Janeiro 1897
Pos, Gregory (Cyrillic 'P' in circle)	Ukraine 1918 (also 1992 ovpt)	London, expert since 1970s
Poser, Dr. Richard	Italian States (Papal States and Romagna)	Braunschweig, BPP 1961
posthorn	Cechoslovakia	See Zampach
Pothion, Jean-Jacques	France (cancellations, pre-adh.)	Paris, 1918–87, AIEP 1970–82
Pothion, Vincent	France	Paris, b. 1950, dealer, [FFE2]. Note
Pötzsch	Germany (1945–6 certain locals)	.
Poula * Paris (in circle)	Europe, Hungary etc.	René Poulain, Paris, b. 1887, dealer. Note
Poulie, Jan	Netherlands	Amsterdam 1949 1961, Aubonne (Switzerland) 1978, 1907–81, AIEP 1960–81. Note
Powell, Peter W. W.	Confederate States	USA 2000
Prasil, Vaclav	Czechoslovakia	Prague, dealer
Prehnalek, Erwin	Hungary, Czechoslovakia	Also on forged, [Flasch]
Prendushi, Zef ('ZP' boxed). Letterh.	Albania, Epirus, Turkey	Skutari, dealer c. 1928–42, also on forged
President	Japanese occ. Burma	On forged only, [Richard Warren]
PRHO	Russia (Siberia)	On forged
Pritula, V. Vsevolod	Russia (pre-1917), Soviet Union	Moscow 2001, b. 1937, AIEP 1992–99, frequently on forged
Prof. Vin (in Russian script)	Russia	See Vinterstern
Pröschold, Horst K. W. (Proschold, Proeschold)	German States (Saxony), Great Britain, Ireland, Malta, Cyprus, Gibraltar	Frankfurt/M., 1922–89, BPP 1976, AIEP 1975–89
Protivensky, Miloslav	Czechoslovakia	Czechoslovakia, 1911–70, SCF
Provera, Pietro (green sprucetree)	Lombardy-Venetia, Austria	Switzerland (ex Italy), collector. Note
Provinsky, Dr. Peter	New Guinea, Mariana Is. and Marshall Is. (all German), German PO Morocco	Berlin, BPP 2001
Prüfzeichen falsch	German area (mainly)	German for "Forged exp. mark"
Prüss, Max (Pruss, Pruess)	Germany (Zeppelin)	Neu-Isenburg 1950
PS	Togo (Fr.-Eng. occup.)	On stamp w. forged (laser?) ovp (eBay)
PS	Ukraine	See Shchapov
PSE. Certif., 2, 3	USA, BNA, Br. Colonies	Professional Stamp Experts, Florida US, f. 1987, cf. Amer. Phil. Feb. 1998
Ptacovsky, Klement	Czechoslovakia, Slovakia	Bratislava, 1940s, cf. Slovensky F.
Pujalto Madrid (?)	South America	Dealer
Puloaas, Gunnar ('GP')	Estonia	Tallinn, expert c. 1950–95
Püschel, A.	German states	Berlin 1897
Puschmann, Fritz. Certif.	Austria incl. all areas	Vienna 2001, dealer (Öfila), VÖB
PVK	Bulgaria	See P. V. Karaivanoff
PXM	Germany, German states	See Max Piechotte
Pytlícek, Ludvík	Czechoslovakia	Semily (Cz.) 2000, b. 1943, collector, in 2003 accused of selling forgeries
Pyznar, Richard ('RP')	Germany	USA (East coast), dealer
Quast, Albert	Chile, Mexico, Nicaragua; (all pre-1900)	Hamburg, BPP 1968
R (in blue): genuine reprint	Belgium and Colonies	See Soeteman, additional marks
R!S!	Armenia, Azerbaijan, Georgia	Also on forged
R... ?	Russia (Siberia)	.
R. del C.	Cuba	See Campo, Ricardo del
Rachmanow, Wladimir (von)	Switzerland (Cantons), Poland	Warsaw 1926, Bayside NY 1950, b. 1886
Racic	Yugoslavia (SHS)	Croatia, on genuine, [Flasch]
Radanovic, Radenko R.	Yugoslavia and areas	Banja Luka 2004, Phil. Assoc. Serbia M.
Radicevic, Djordje	Yugoslavia and areas	Belgrade 2004, Phil. Assoc. Serbia & M.
Rafay (in oval, stamped on hinge)	Hungary	[Flasch]
Raftopulo, Spiro (Raftopoulos)	Greece	Greece, 1930s. Cf. Raphtopoulos
Ragasztó	Hungary etc.	Hungarian for 'forged'
Ragatz, Dr. Lowell	Worldwide (forgery researcher)	Madison Wis. 1926, 1897–1978, dealer (Reliance Stamp Co. t.a. George van den Berg)
Rainer, H.	.	VÖB honorary member
Rajits, N. P.	Albania	.
Raphtopoulos, A.	Greece	Greece, until 1970s. Cf. Raftopulo
Rapp, Peter	Worldwide	Wil (CH), auctioneer 1970–, member of BPB, q.v.
Rappaporte	German Colonies	.
Raritan Stamps Inc.	Russia, Soviet Union	Dayton NJ 2006, dealers
Rasch	Mexico	.
Rasche, Walter	German States (Hannover and Prussia)	Bad Neundorf 1950, Hannover, BPP 1961
Rathausky, Josef	Greece	Czechoslovakia, 1901–83, CSF
Rathje, Eigil	Denmark	Copenhagen, 1901–86, AIEP 1954–c.56
Rauh	Argentina, Uruguay	.
Ray, Samuel	Palestine, China	Chicago, 1912–92, AIEP 1969–92
Raybaudi-Massilia, Dr. Luigi	Italy and States	Rome 1943, 1913–2003, dealer, AIEP 1954–2002
Raybaudi-Massilia, Maurizio	Italy and States	Rome 2002, b. 1937, indep. expert, AIEP 1983–99. Note
RB	Yugoslavia (SHS)	Perhaps Ruggero Benuzzi (q.v.), [Flasch]
RD	Belgium	See Delapierre
RDM	Central America	See Duron Membreño
Reach, Zikmund	Czechoslovakia	Prague, 1859–1935, dealer
Refky, M. A.	Mongolia	Seen exclusively on forgeries.
Rehfeld, Martin	Germany East	Königs Wusterhausen
Rehn, Erhard; 'Rehn Hall'	Germany (1945 Saxony locals), Germany East (Mi 212–, prev. also Bezirk 1948)	Munich, BPP 1961
Reine, G.	French Colonies, Hungary, Albania	Paris, 1920s, dealer, [Flasch]
Reinhardt, Werner	Liechtenstein	Chur (CH), BPP 1984.
Reinhardt, Theodor	German States (Wurttemberg)	Stuttgart 1897
Reinheimer, A.	German States	Frankfurt 1897
Reinikainen, Heikki. Certif.	Finland (1875)	Helsinki, b. 1937, Finn. Phil. Fed. 1996–
Reinoso, Juan	Costa Rica	San José, dealer, Asoc. Filat. C. R. 2001
Rellstab, Emil. Certif.	Switzerland (1843–)	Mönchaltorf (CH), 1928–2006, expert 1972–2006, BPP 1976, AIEP 1981–2006, SBPV until c. 2002, [FFE1 2 3 5, PE]
Renard, Nicholas	Worldwide (pre-1900)	Mürnau 1950
Rend, Dr. Ferenc	Hungary, Rumania (Regatul)	Budapest, [Flasch 141]
Rendon, Alex (Alejandro) (Works as member of committee.)	USA, Bolivia, Colombia	New York NY, b. 1940, expert 1970–, AIEP 1982–, [FFE5, PE]
Renggli, Hans-Peter. Certif.	Switzerland. Note	Reinach BL (CH) 2001, SBPV –2002
Renon	Spain	.
Rep. (boxed)	Worldwide	The stamp has been repaired
Replik (printed; easily erased)	Worldwide	On back of Peter Winter forgeries
Ressel, Oskar	Worldwide	Berlin 1943, dealer
Reum, Dr. Kurt	German States (Thurn & Taxis)	Meiningen (DDR), 1913–83, AIEP 1972–83
Reuterskiöld, Baron Axel de	Switzerland, Great Britain and Colonies	Lausanne, 1860–1937, philatelist
Revaler Philatelisten Verein e.V.	Estonia	Tallinn 1936, expert F. Klemann. Note
Revest, A.	Armenia, Azerbaijan, Georgia	Also on forged
RF (in circle, with four dots)	Hungary	On genuine, [Flasch]
Riba Praha	Czechoslovakia	Prague, dealer
Ribbing, Dag. Certif.	Italian States (at least)	Stockholm 1898–1980, architect
Riccio, Dr. Dominick	Carpatho-Ukraine	New York NY 2001, UPNS expert
Richardson F (in circle; F= forgery)	Worldwide (forgeries only)	David R., GB, a forgery collector's mark
Richter, Alexander	Bulgaria	Ruse (BG) 1897
Richter, Georg (in script or in block), 2	Worldwide	Berlin, 17.11.1874–22.3.1960, expert c. 1930–60, frequently also on forged. Note
Richter, H.	Australia	.
Richter, Heinzgeorg. Certif.	Great Britain, Cape of Good Hope, Cyprus, Gibraltar, Ireland, Malta, Mauritius	Wöllstadt (Germany) 1998, d. 1980s, independent expert. Note
Richter, L.	Hungary	Budapest 1897
Richter, Walt(h)er	German occ.s (Poland, Ober Ost and Etapp. West)	Heidelberg 1950 1961, 1877–1959
Ricotti, Umberto	Fiume	Fiume, [Flasch]
Rieger, Dr. Bohus	Europe (pre-1900)	Czechoslovakia, 1895–1977
Rieger, F.	Yugoslavia	Berlin-Reinickendorf 1961
Riep, Oscar	Russia and areas	Berlin, d. 1928, dealer
Rijxman, Dr A. S.	Germany (1945 locals), Czechoslovakia (Sudetenland issues)	Hilversum. Information
Ringström, Sigurd (Ringstrom)	Worldwide (locals), Iceland	Trelleborg (Sweden), 1908–92, philatelist, author
Rinsch, Heinrich	German States (Bremen), Heligoland, Italy (Meran), German occ. Libau, Poland, Russia, Soviet Union	Essen-Stadtwald 1950, 1890–c.1975, BPP 1961, AIEP 1954–75
Risigari, L.	Italy and States	Rudolstadt 1897
Rismondo, Tilo. Certif.	German States (Saxony), Austria (pre-1918)	Chemnitz, b. 1938, BPP 1991, VÖB
Ristic, Jovan	Yugoslavia and areas	Belgrade 2004, Phil. Assoc. Serbia & M.
Ritter, Franz	Germany (Infla)	Munich, BPP 1958–
Ritter, Hermann	Switzerland, Heligoland, Turkey, Germany and States (–1944), German Colonies, Danzig, Memel, Saar, Liechtenstein	Zurich 1949, official expert 1949
Rivière	Fr. Colonies	France?, dealer?
Rjaci	Fiume	On genuine, [Flasch]
RJC (also in oval). Note	Russia (areas), etc.	See Ceresa; in use pre-1970
RJT (in manuscript)	Saudi Arabia	See Thoden
Robauer, L.	Uruguay	?
Robert	Germany (field post WW2)	Germany?
Robert, J. B.	Netherlands	The Hague 1897
Roberts, C. W. (Cecil William), also in script, 'CWR'	Russia (areas), Ukraine	Great Britain, 1899–1974, AIEP 1959–74, [UPNS]
Robertson, Peter A. (PAR)	Cuba	USA, b. 1943, AIEP 1987–94
Robles, Roberto	Guatemala	Quezaltenango, dealer
Robineau, F. A.	France (and areas), Saar, Great Britain	France 1966 1990
Robineau, Jacques. Certif., 2 (the company)	France (Ballons Montés)	Paris 1949, 1913–91, dealer, AIEP 1970–91
Rocha, Carlos Hernández	Uruguay	Federación Urugaya de Filatelia
Rockling, Dr. S. (Romeko)	Russia, Ukraine, Hungary	See Romeko
Rodehuser, F. H.	German occ. Kurland	Dealer? Seen on probably genuine.
Rodendorf, Karl (Cyrillic 'KP')	Ukraine	Moscow, a forger, always on his forged
Rodewald, Adolf ('A.R.')	Germany East (1945 locals Grabow)	.
Rodin, Igor	Russia (astrophilately)	Moscow, b. 1962, expert 1994–, AIEP c.2006–
Rogina, Nenad. Certif.	Fiume	Varaždin HR, HSF 2014–
Rohr (two, one in script)	Germany, German Colonies, French PO Levant	.
Roig, A., Barcelona, 2 (Catalan: Antoni Roig)	Spain, Europe, Worldwide. Seen on forged eg. Cracow 1919 and Japanese stamps	Dr. Antonio Roig Soler, Barcelona 1943, 1881–1970, dealer, AIEP 1954–70, his mark 2 has been forged. Note
Roig, Ramón	Spain, Russia, France	COMEX 1996
Romeko Paris. Certif.	Russia (areas), Ukraine, Hungary (on forged ovpt)	Dr. Serge Rockling (Rochlin, Rocklin), Paris, 1893–1975, dealer t.a. Maison Romeko 1921–c.65, AIEP 1968–75
Rommel, Dr. O.	German States (Bergedorf, Lubeck), Peru	Leipzig 1897
Rommerskirchen, Dr. Helmut	Croatia; German occ.s Albania, Channel Is. and Soviet Union	Krefeld, BPP 1968
Roosevelt, Franklin D.	USA	Item that belonged to President R.
Roots, J. (Jaan)	Estonia	Oslo 2004, EFL 2004–. Note
Rosauer, L.	Portugal	.
Rose, Hans	Germany (Wohnungsbau)	Kitzingen, BPP 1968
Rosen, Bill	USA, BNA, Br. Colonies	Profess. Stamp Experts 2000
Rosenberg, Ad.	Heligoland	Frankfurt 1897
Rosenberg Jr., B.	Rumania	Bucarest 1897
Rosende, Dr. Alberto	Cuba	.
Rosende, Dr. Roberto (RR)	Cuba	Yonkers NY, b. 1935, AIEP 1981–2002
Rosenius (by pencil)	Finland (pre-1875 covers)	Dr. Carl, Helsinki 1961. Famous collector.
Rosenkrantz, Albin	German States (Schleswig-Holstein)	Kiel, 1851–1913
Rosin	Central Lithuania	Dealer?
Rosselevitch, Anatoly ('Ross, 2')	Armenia, Azerbaijan, Georgia, Russia (areas)	Brussels 1949, later USA, d. c. 1980, dealer
Roth, Douglas	Cape of Good Hope	Newlands (South Africa), 1906–90, AIEP 1970–80
Rothe	Costa Rica	.
Roumet, Alexandre. Certif.	France and Colonies	Paris 2002, cf. below
Roumet Exp., 2 (Roumet in circle)	France and Colonies	Alexandre and Philippe R., Paris 2000, dealers f. 1896 by Octave R.
Roumet, Octave	France and Colonies, Worldwide	Paris 1926, dealer
Roumet, Philippe	France and Colonies	Paris, b. 1921, dealer (Maison Roumet), AIEP 1954–c.56
Roussos	Greece	.
Rowell, Milo David ('MDR', or sign.)	Japanese occ. (all territories)	USA, 1926–92, US Colonel, ISJP, APS
RP	Germany	See Pyznar
RPS, RPSL Certif., 2, 1917. Note	Br. Colonies, Worldwide	Royal Philatelic Society London, expert comm. 1894–, [FFE2 p.173; Brühl p.482, PE]
RPSNZ	New Zealand, Br. Pacific Is.	Royal Philatelic Society of New Zealand, exp. comm. f. 1952, [PE]
RPS of Victoria. Certif.	Australia, New Zealand, Br. Pacific Is.	Royal Philatelic Society of Victoria, exp. comm. f. 1949, [PE]. Note
RR	Cuba	See Rosende, Dr. Roberto
RS (in circle)	Ukraine	See SR
Rucins, A. G. (Arvid G.). Rucins	Estonia, Latvia	Latvia?, active c. 1950–70
Rudminski Odessa	Ukraine	Odesa, dealer
Rudolph, Hans	Finland (incl. Aunus etc.)	Cossebaude (Germany), BPP 1991
Ruggiero, Michael Eugene (Worked as chairman of committee.)	Japan, Korea	Staten Island NY, 1928–2013, expert 1974–, AIEP 2002–c.06, ISJP, [FFE6, PE]
Rühland, Gustav (Ruehland)	German States (Brunswick 1864)	Braunschweig, 1859–1932
Ruidiaz (Beremundo Ruidiaz Alfonso)	Central America	Mexico DF 1949, dealer, forged
Ruiz, Alfonso	Spain	Madrid pre-WW2, dealer's advert.
Rummel, Wilhelm	German States (Bremen), German occ. Rumania	Bremen 1935 1950, 1885–1959
Rungas, Wolf	Germany (field post Mi 1–4, Inselpost)	Munich, d. 1981, BPP 1961
Rupp, Bruno. Certif.	Switzerland	Liechtenstein, b. 1912, SBPV (now retired), AIEP 1970–74
Rusu-Arad	Rumania (Regatul)	On genuine, [Flasch]
Ruthphil	Ukraine	Dealers?
Rutkowski (also in script)	Ukraine	Ukraine, later Bulgaria, collector, main distributor of the so-called Kherson local
Ryblewski, Jan	Poland	Kraków 2000, b. 1919 d. c.2005, Polish Fed., AIEP 1972–2002

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PHILATELIC EXPERTS AND DEALERS: STAMP EXPERT MARKS.

NAMES M–R