1996 Burkina Faso
1980 Zimbabwe
1976 Costa Rica
1993 Uzbekistan
1984 Afghanistan - Wildlife
1992 Latvia
1974 Albania
1997 Namibia
1980 Swaziland
1994 Namibia
1977 Mauritius
1977 Mauritania
1995 Kyrgyzstan
400 postally used US stamps, including airmails!
Less than 60¢ per cover.
Neat variety of cork fancy cancels on early US issues.