1972-75 Russia
1961-63 Russia
1963-66 Russia
1978 Russia
1964 Russia
1977 Russia
1969 Russia
1961 Russia
1968 Russia
1959 Hungary
1963 Russia
1967 Russia
1971 Russia
400 postally used US stamps, including airmails!
Less than 60¢ per cover.
Neat variety of cork fancy cancels on early US issues.