1939-49 Argentina
1954 Pakistan
1910-21 Argentina
1898 Newfoundland
1933 Canada
1896 Montenegro
1894 Malaya Sungei Ujong
1898 Canada
1951 Poland
1950 North Borneo
1935 Paraguay
1951 Pakistan
400 postally used US stamps, including airmails!
Less than 60¢ per cover.
Neat variety of cork fancy cancels on early US issues.