First day cover and four stamps at 18
1987
1987
1989
1998
1990
1967
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1870-1950
1999
1999
1999
1999
1999
1999
1964
1949
1957
1991
1955-1959
1971
1983
1964
2000
2000
1999
2000
1999
1999
2000
2000
2000
2001