FACTAJ overprinted on stamps of Romania  | Romania - parcel post stamp - 1928  | 
FACTURI BORDEROURI and ROMANIA  | Romania - revenue stamp  | 
FALKLAND ISLANDS DEPENDENCIES  | Falkland Islands Dependencies - issues for the islands of South Sandwich and South Georgia - 1846-1985?  | 
FALTPOST and KENTTAPOSTIA  | Finland - military field post stamp - each serviceman was given several of these free every month  | 
FARDOS POSTALES and COREOS DE EL SALVADOR  | El Salvador - parcel post stamp 1895  | 
FARIDKOT  | India - Faridkot  | 
FARIDKOT STATE overprinted on stamps of India  | India - Faridkot  | 
FARIDKOT STATE and SERVICE overprinted on stamps of India  | India - Faridkot - official stamp  | 
FDO. POO  | Fernando Po  | 
FEBBRAIO 1945 overprinted on stamps of Italy - Rhodes  | Italy - Aegean Islands - Rhodes - semipostal stamp - 1945 - Red Cross  | 
FEDERAL REPUBLIC OF CAMEROUN  | Cameroun  | 
FEDERAL TAX PAID and IMPERIAL ETHIOPIAN GOVERNMENT  | Ethiopia - revenue stamp  | 
FEDERATED MALAY STATES  | Malaya - 1900-1934  | 
FEDERATED MALAY STATES overprinted on stamps of Negri Sembilan  | Malaya - 1900  | 
FEDERATES STATES OF MICRONESIA  | Micronesia  | 
FEDERATION DU MALI  | Mali - Federation of Mali - 1959-1960  | 
FEDERATION OF MALAYA  | Malaya  | 
FEDERATION OF SOUTH ARABIA  | South Arabia  | 
FEES and LEEWARD ISLANDS  | Leeward Islands - revenue stamp  | 
FELDPOST overprinted on stamps of Germany  | Germany - military stamps  | 
FELDPOST 2 KG overprinted on stamps of Germany  | Germany - military parcel post stamp - for parcels up to 2 kilograms in weight - 1944  | 
FERANADO POO  | Fernando Po  | 
FEUDATORY STATE OF RAJ NANDGAON  | India - Nandgaon  | 
FEZZAN  | Libya - Fezzan - French occupation - 1949-1951  | 
FEZZAN GHADAMES  | Libya - Fezzan-Ghadames - French occupation - 1946  | 
FIDES and CAMEROUN  | Cameroun - 1956 - 'Fonds D'Investissement pour le Developpement Economique et Social' - Economica and Social Development Fund for Overseas Possessions  | 
FIERA DI TRIESTE overprinted on stamps of Italy  | Italy - Trieste - zone A  | 
FIJI TIMES EXPRESS  | Fiji - 1870-1871 issues  | 
FILIPAS  | Philippines  | 
FILIPAS IMPRESOS  | Philippines - newspaper stamps  | 
FILIPINAS  | Philippines  | 
FILLER  | Hungary - monetary unit  | 
FILS  | Abu Dhabi - monetary unit  | 
FIRST TRANS ATLANTIC AIR POST APRIL 1919 overprinted on stamps of Newfoundland  | Newfoundland - April 12, 1919 - for Trans-Atlantic flight by Hawker - Newfoundland's first airmail stamp  | 
FIUME overprinted on stamps of Hungary  | Fiume - 1918  | 
FIUME and ESPRESSO  | Fiume - special delivery stamp - 1920-1924  | 
FIUME and FRANCOBOLLO POSTALE PER GIORNALI  | Fiume - newspaper stamp - 1920  | 
FIUME and SEGNATASSE  | Fiume - postage due stamp - 1919,1921  | 
FIVE CENTS REVENUE overprinted on stamps of North Borneo  | North Borneo - revenue stamp  | 
FIVE PENCE overprinted on stamps of New Zealand  | New Zealand - airmail stamp - 1931  | 
FIVME  | Fiume - the 'V' is a stylized 'U'  | 
FLUCHTINGSHILFE MONTENEGRO overprinted on stamps of Yugoslavia  | Montenegro - German administration - semi-postal stamp - 1944  | 
FLUGFRIMERKI  | Iceland - air mail stamp  | 
FLUGPOST overprinted on stamps of Austria  | Austria - airmail stamp  | 
FLUGPOST and DANZIG  | Danzig - airmail stamp  | 
FLUGPOST and FREIE STADT DANZIG  | Danzig - airmail stamp  | 
FLUGPOST overprinted on stamps of France  | Memel - airmail stamp  | 
FLUGPOST and REPUBLIK OSTERREICH  | Austria - airmail stamp  | 
FM overprinted on stamps of France  | France - military stamp - 'Franchise Militaire' - 1901-1945  | 
FM overprinted on stamps of Central Africa  | Central Africa - military stamp  | 
FM and REPUBLIQUE FRANCAISE and POSTES  | France - military stamp - 1946  | 
FNR JUGOSLAVIA  | Yugoslavia  | 
FONDUL AVIATIEI and ROMANIA  | Romania - postal tax stamp  | 
FORCES FRANCAISE LIBRES LEVANT overprinted on stamps of Syria or Lebanon  | Syria - military stamp - free French administration - 1942  | 
FORCES FRANCAISE LIBRES and LEVANT  | Syria - military stamp - free French administration - 1942  | 
FOREIGN AFFFAIRS and DEPT OF and HAWAII  | Hawaii - official stamp - foreign affairs - 1896  | 
FOREIGN EXPRESS DELIVERY overprinted on stamps of Mauritius  | Maritius - special delivery stamp  | 
FOROYAR  | Faroe Islands  | 
FOROYAR and VALUTAGJALD  | Faroe Islands - revenue stamp  | 
FOR U.S. ADDRESSES ONLY and F and USA  | United States of America - nondenomiated stamp/no value indicated - 1991 - 29 cent face value  | 
FRANC overprinted on stamps of Austria  | Austria - Offices in Crete  | 
FRANCA overprinted on stamps of Peru  | Peru - provisional issues for Aneanchs and Chicayo - 1884  | 
FRANCAISE  | France  | 
FRANCE LIBRE FNFL overprinted on stamps of Saint Pierre and Miquelon  | Saint Pierre and Miquelon - 1942 - "FNFL" - "Forces Naavales Francaises Libres" - "Free French Naval Forces"  | 
FRANCHISE MILITAIRE and REPUBLIQUE FRANCAISE  | France - military stamp - 'Franchise Militaire' - 1946-1964?  | 
FRANCO overprinted on stamps of Uruguay  | Uruguay - official stamp  | 
FRANCO  | Switzerland - monetary unit  | 
FRANCO BOLLO and no country name  | Italy - perforated stamps  | 
FRANCO BOLLO and no country name  | Italian States - Sardinia (imperforate stamps)  | 
FRANCO BOLLO DI STATO  | Italy - official post card  | 
FRANCO BOLLO DI STATO  | Italy - official stamps  | 
FRANCO BOLLO POSTALE and BAJ  | Italian States  | 
FRANCO BOLLO POSTALE and CENT  | Italian States  | 
FRANCO BOLLO POSTALE and CENTESIMI  | Italian States  | 
FRANCO BOLLO POSTALE ITALIANO  | Italy  | 
FRANCOBOLLO POSTALE PER GIORNALI and FIUME  | Fiume - newspaper stamp - 1920  | 
FRANCO BOLLO POSTALE and SCUDO  | Italian States  | 
FRANCO BOLLO POSTALE and TOSCONO  | Italian States - Tuscany  | 
FRANCO BOLLO and PROVINCE MODONES  | Itialian States - Modena  | 
FRANCO FIUME overprinted on stamps of Hungary  | Fiume - 1919  | 
FRANCO MARKE  | Germany - German States - Bremen - 1850s issues  | 
FRANCO and RAPPEN  | Switzerland - 1850s issues  | 
FRANCO SCRISOREI  | Romania - Moldavia - Walnchia  | 
FRANK and CANADIAN PACIFIC RAILWAYS and TELEGRAPH  | Canada - telegraph stamp - Canadian Pacific Railways  | 
FRANK and TELEGRAPH COMPANY and GTP  | Canada - telegraph stamp - Grand Trunk Pacific Railways  | 
FRANQICIA POSTAL  | Spain - franchise stamp  | 
FRANQUEO DEFICIENTE  | Nicaragua - postage due stamp  | 
FRANQUEO DEFICIENTE  | El Salvador - postage due stamp  | 
FRANQUEO ESPANA  | Spain - Carlist issue  | 
FRANQUEO OFICIAL  | Nicaragua - official stamp  | 
FRANQUEO OFICIAL  | Guatemala - official stamp  | 
FRANQUEO OFICIAL  | El Salvador - official stamp  | 
FRANQUICIA  | Spain - franchise tax - 1881  | 
FRAZER & CO CITY DESPATCH POST  | United States of America - carriers's stamp 1840's-1850's - Cincinnati, Ohio  | 
FREI DURCH ABLOSUNG NR 16  | Germany - local official stamp for Baden  | 
FREI DURCH ABLOSUNG NR 21  | Germany - local official stamp for Prussia  | 
FREIE STADT DANZIG  | Danzig - German for "Free State Danzig"  | 
FREIMARKE and no country name  | Germany - Prussia - 1850s-1860s  | 
F.REIN overprinted on stamps of Philippines  | Philippines - air mail stamp - 1933  | 
FREISTAAT BAYERN overprinted on stamps of Germany  | Bavaria - 1919  | 
FRIEMARK and KREUZER  | Germany - Wuttemberg - 1860s issues  | 
FRIMARKE KGL POST  | Denmark - 'Frimaerke Konglilgt Post' - 'royal postage stamp'  | 
FRIMARKE LOKALBREF  | Sweden - local stamp for Stockholm 1850s-1860s  | 
FRIMARKE and SVERIGE  | Sweden  | 
FRM and KGL and POST  | Denmark - 'Frimaerke Konglilgt Post' - 'royal postage stamp'  | 
FRM and KGL and POST  | Danish West Indies - 'Konglilgt Post Frimaerke' - 'royal postage stamp'  | 
FT  | Hungary - monetary unit (forint)  | 
FUERSTENTUM LIECHTENSTEIN  | Liechtenstein  | 
FUR KRIEGSBESCHADIGTE overprinted on stamps of Germany  | Germany - semipostal stamp - to help people disabled during the war  | 
FURSTENTUM LIECHTENSTEIN and ZEPPELINPOST  | Liechtenstein - airmail stamp - 1931  | 
F USA and FOR U.S. ADDRESSES ONLY  | United States of America - nondenomiated stamp/no value indicated - 1991 - 29 cent face value  |