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Desc: 0.50db
Currency: São Tomé and Príncipe dobra (100c=1db=1d)
Numerical sorting value: 3000
Equivalent denoms: 0.5d (3), 50c (3)
Users of this denom: St. Thomas & Prince Islands (28 stamps, 1979-1989)
Used by 28 stamps of St. Thomas & Prince Islands: (See all uses as list)
11/29/1979 0.50db issue=450th Anniversary of the Death of Albrecht Durer perf=14
11/29/1979 0.50db issue=450th Anniversary of the Death of Albrecht Durer perf=14
12/21/1979 0.50db issue=35th Anniversary of ICAO dt=aircraft (1979 St. Thomas & Prince Islands) d=Wright Flyer I & ICAO emblem perf=15
12/21/1979 0.50db issue=Birds 1979 dt=birds (1979 St. Thomas & Prince Islands) d=Serinus rufobrunneus perf=14
12/21/1979 0.50db issue=Birds 1979 dt=birds (1979 St. Thomas & Prince Islands) perf=14
12/28/1979 0.50db issue=Fish 1979 dt=fishes (1979 St. Thomas & Prince Islands) d=Cypselurus lineatus perf=14
12/28/1979 0.50db issue=History of Aviation dt=balloons (1979) d=Blanchard, 1784 perf=15
12/28/1979 0.50db issue=History of Aviation b dt=airships (1979 St. Thomas & Prince Islands) d=Dupois de Lorne, 1872 perf=15
5/22/1981 0.50db issue=mammals 1981 d=Crocidura thomensis perf=14
5/22/1981 0.50db issue=mammals 1981 d=Mustela nivalis (1981) perf=14
5/22/1981 0.50db issue=Seashells 1981 dt=seashells (1981 St. Thomas & Prince Islands) d=Hexaplex hoplites perf=14
5/22/1981 0.50db issue=Seashells 1981 dt=seashells (1981 St. Thomas & Prince Islands) d=Bolinus cornutus (1981) perf=14
12/21/1982 0.50db issue=Explorers 1982 dt=explorers (1982) d=Thor Heyerdahl, "Kontiki" perf=14
12/28/1983 0.50db issue=Medicinal Plants 1983 dt=medicinal plants (1983) d=Cymbopogon citratus (1983) perf=13.25
12/30/1983 0.50db issue=1983 dt=birds (1983 St. Thomas & Prince Islands) d=Spermestes cucullatus perf=13.25
6/19/1984 0.50db issue=25th Anniversary of International Maritime Organization / Universal Postal Congress 1984 d="Phoenix" (1869) perf=14x13.75
6/19/1984 0.50db issue=25th Anniversary of International Maritime Organization / Universal Postal Congress 1984 d="Hamburg" (1893) perf=14x13.75
6/19/1984 0.50db issue=25th Anniversary of International Maritime Organization / Universal Postal Congress 1984 d="Prince Heinrich" (1900) perf=14x13.75
6/19/1984 0.50db issue=25th Anniversary of International Maritime Organization / Universal Postal Congress 1984 d="Phoenix" (1869) perf=14x13.75
6/19/1984 0.50db issue=25th Anniversary of International Maritime Organization / Universal Postal Congress 1984 d="Hamburg" (1893) perf=14x13.75
6/19/1984 0.50db issue=25th Anniversary of International Maritime Organization / Universal Postal Congress 1984 d="Prince Heinrich" (1900) perf=14x13.75
11/1/1986 0.50db issue=Automobiles 1986 dt=automobiles (1986 St. Thomas & Prince Islands) perf=13.25
11/2/1986 0.50db issue=Railways 1986 dt=Railways (1986) perf=13.25
12/25/1986 0.50db issue=Christmas 1986 perf=13.25
10/30/1987 0.50db issue=10th Anniversary of Institute for Sports perf=14
12/30/1987 0.50db issue=World Scout Jamboree 1987 perf=14
12/15/1988 0.50db issue=125th Anniversary of International Red Cross
7/14/1989 0.50db issue=1989 dt=fruits (1989 St. Thomas & Prince Islands) d=Annona muricata (1989) perf=14
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