O) 1904 CHILE, GUAYAQUIL, SEMINARY PARK, CIRCULATED TO MONTEVIDEO
M) 1993, COSTA RICA, DOLPHIN PROTECTION, INTERNATIONAL ARTS FESTIVAL, MAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1993, COSTA RICA, DOLPHIN PROTECTION, INTERNATIONAL YEAR OF THE FAMILY, AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1993, COSTA RICA, DOLPHIN PROTECTION, MAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1993, COSTA RICA, FLORA OF THE TROPICAL FOREST, HERBACEOUS VINE, MAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1993, COSTA RICA, INTERNATIONAL FESTIVAL OF THE ARTS, DOLPHIN PROTECTION, VIA AIR MAIL, AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1993, COSTA RICA, L ANNIVERSARY OF THE ESTABLISHMENT OF SOCIAL GUARANTEES IN COSTA RICA, DOLPHIN PROTECTION, L ANNIVERSARY OF THE NATIONAL CHAMBER OF COMMERCE AND INDUSTRY, VIA AIR MAIL, AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1993, COSTA RICA, L ANNIVERSARY OF THE ESTABLISHMENT OF SOCIAL GUARANTEES IN COSTA RICA, MARINE FAUNA, SNAIL TONGUE, CYPHOMA GIBBOSUM, AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1993, COSTA RICA, L ANNIVERSARY OF THE ESTABLISHMENT OF SOCIAL GUARANTEES IN COSTA RICA, MARINE FAUNA, SNAIL TONGUE, XV CONGRESS OF THE INTERNATIONAL ASSOCIATION OF CUSTOMS AGENTS, CYPHOMA GIBBOSUM, AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1993, COSTA RICA, L ANNIVERSARY OF THE ESTABLISHMENT OF SOCIAL GUARANTEES IN COSTA RICA, MARINE FAUNA, VIA AIR MAIL, CORREO AEREO, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1993, COSTA RICA, L ANNIVERSARY OF THE ESTABLISHMENT OF SOCIAL GUARANTEES IN COSTA RICA, XV CONGRESS OF THE INTERNATIONAL ASSOCIATION OF CUSTOMS AGENTS, CHRISTMAS STAMP, AIRMAIL, CIRCULATED COVER COSTA RICA TO FINLANDIA
M) 1993, COSTA RICA, L ANNIVERSARY OF THE ESTABLISHMENT OF THE SOCIAL GUARANTEES OF COSTA RICA, AIRMAIL VIA AIR MAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1993, COSTA RICA, L ANNIVERSARY OF THE NATIONAL CHAMBER OF COMMERCE AND INDUSTRY, DOLPHIN PROTECTION, AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1993, COSTA RICA, OVERLOADED, L ANNIVERSARY OF THE NATIONAL CHAMBER OF COMMERCE AND INDUSTRY, L ANNIVERSARY OF THE ESTABLISHMENT OF SOCIAL GUARANTEES IN COSTA RICA, AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1994, COSTA RICA, INTERNATIONAL YEAR OF THE FAMILY, MARINE FAUNA, TONGUE SNAIL, CYPHOMA GIBBOSUM, AIRMAIL, CIRCULATED COVER COSTA RICA TO FINLANDIA
M) 1994, COSTA RICA, MARINE FAUNA, CROWN OF THORNS, ACANTHASTER PLANCI, PROTECTION OF THE DOLPHIN, AIRMAIL, CIRCULATED COVER COSTA RICA TO FINLANDIA
M) 1994, COSTA RICA, MARINE FAUNA, RUBY STAR, OPHIODERMA RUBICUNDUM, L ANNIVERSARY OF THE GUANACASTE INSTITUTE, AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1995, COSTA RICA, CHARACTERS, JOSE MARTI, AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1995, COSTA RICA, CHARACTERS, JOSE MARTI, MAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1995, COSTA RICA, MARINE FAUNA, TONGUE SNAIL, CYPHOMA GIBBOSUM, XXX ANNIVERSARY OF THE NATIONAL INSTITUTE FOR THE DEVELOPMENT OF TELECOMMUNICATIONS, AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1995, COSTA RICA, MARINE FAUNA, TONGUE SNAIL, GHOST CRAB, OCYPODE SP, OVERLOADED, MIGUEL ANGEL CASTRO CARAZO, AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1996, COSTA RICA, HEROES OF THE 1856 CAMPAIGN, JUAN SANTAMARIA, BIRDS, BLUE AND WHITE SWALLOW, VIA AIR MAIL, AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1996, COSTA RICA, III MILLENNIUM OF JERUSALEM MINARET, STAR AND CHRISTIAN DOME, VIA AIR MAIL, AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1996, COSTA RICA, III MILLENNIUM OF JERUSALEM MINARET, STAR AND CHRISTIAN DOME, MAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1996, COSTA RICA, LACSA L ANNIVERSARY, NATIONAL AIRLINES, DOUGLAS DC-6B AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
M) 1996, COSTA RICA, LACSA L ANNIVERSARY, NATIONAL AIRLINES, DOUGLAS DC-8, ONU L ANNIVERSARY, AIRMAIL, CIRCULATED COVER FROM COSTA RICA TO FINLANDIA
O) 1883 COSTA RICA, GENERAL PROSPERO FERNANDEZ, TIMBRE PROPORCIONAL, GUANACASTE, OFICIAL OVERPRINTS, EXTRAORDINARY SET XF
O) 1892 COSTA RICA, COAT OF ARMS SCT 43 5p blue, USED AND UNUSED, XF
O) 1892 COSTA RICA, COAT OF ARMS, 2 pesos, USED AND UNUSED, XF
O) 1892 COSTA RICA, COAT OF ARMS, 20 centavos scarlet, MUTE CANCELLATION, XF
O) 1892 COSTA RICA, COAT OF ARMS, SCT 38 10c green, OFICIAL OVERPRINTED, WITH CANCELLATION, XF
O) 1892 COSTA RICA, COAT OF ARMS, SCT 40 50c gray blue, XF
O) 1892 COSTA RICA, COAT OF ARMS, SCT 37 5c red lilac, SCT 37a 5c violet, OFICIAL OVERPRINTED, XF
O) 1892 COSTA RICA, COAT OF ARMS. SCT 42 2p brown, USED AND UNUSED, XF
O) 1892 COSTA RICA, REVENUE, CHRISTOPHER COLUMBUS, DISCOVERY, XF
O) 1894 COSTA RICA, COAT OF ARMS 10 centavos, VIA NEW YORK, POSTAL STATIONERY CIRCULATED TO GERMANY
O) 1901 COSTA RICA, VIEW OF PORT LIMON, SCT 47 5c gray blue, WITH CANCELLATION, XF
O) 1901 COSTA RICA, JOSE M. CASTRO, SCT 50 50c dull lilac and blue, MUTE CANCELLATION, XF
O) 1902 COSTA RICA, JUAN MORA FERNANDEZ, MUTE CANCELLATION, 2 centavos green POSTAL STATIONERY, CIRCULATED TO SWITZERLAND
O) 1903 COSTA RICA, JULIAN VOLIO, JULIAN VOLIO, 25 centimos gray, lilac brown, LARGE CANCELLATION, X
O) 1903 COSTA RICA, MAURO FERNANDEZ, SCT 72 5c orange, VARIETY IN CANCELLATION, XF
O) 1903 COSTA RICA, POSTAGE DUE STAMP, SCT J2 10c brown orang, WITH CANCELLATION, XF
O) 1904 COSTA RICA, CHRISTOPHER COLUMBUS - COLON 10 centimos. CIRCULATED TO LUBECK GERMANY, POSTAL STATIONERY, XF
O) 1905 COSTA RICA, COLON - COLUMBUS 10 centmos - UPU, POSTAL STATIONERY CIRCULATED TO GERMANY, EMBOSSED, XF
O) 1905 COSTA RICA, BRAULIO CARRILLO, MUTE CANCELLATION, W. STEINVORTH AND HERMANO, CIRCULATED TO GERMANY
O) 1907 COSTA RICA, EUSEBIO FIGUEROA OREAMUNO, SCT 65 25c olive green and black, REMAINDER CANCELLATION. MNH
O) 1907 COSTA RICA, FRAGMENT, COLON 10 centimos ENVELOPE, PUNTARENAS CANCELLATION, UPU, XF
O) 1907 COSTA RICA, HEREDIA PROVINCE, CHRISTOPHER COLUMBUS, COLON 5 centimos- UPU, BOX CANCELLATION, CIRCULATED TO SAN JOSE, XF