Stamps, bl&gray color
1 to 44 of 44
- Turkey, 1890
- 1947
- 1950
- France, 1955
- 1967
- 1987
- Germany, 1997
- Ascension, 1924
- South Africa, semipostal, 1933
- Canada, 1968
- Greece, 1959
- Colombia, airmail, 1960
- United States, 1961
- Denmark, 1895
- East Africa & Uganda Protectorates, 1903
- 1904
- Poland, 1959
- 1963
- Estonia, 1993
- Finland, 1960
- Gibraltar, 1981
- Guernsey, 1978
- Haiti, 1983
- Iceland, official, 1907
- 1920
- Latvia, airmail semipostal, 1932
- Liechtenstein, 1949
- Mexico, airmail, 1962
- Netherlands, 1986
- Norway, 1959
- 1961
- 1963
- Romania, airmail, 1957
- 3.30l
- St. Pierre & Miquelon, 2003
- St. Thomas & Prince Islands, 1948
- Saudi Arabia, 1965
- 3pi
- Sweden, 1983
- Vatican City, 1961
1 to 44 of 44