Stamps of United States - Canal Zone, 1200 ndenom
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postage
1925, Jun 27 1925 issue ovpted on stamp of United States flat plate print unwmk p. 11
| - | 20c | carrose | ovpt, Golden Gate | — | — |
1928 1928 issue (no wmk info) (no perf info)
| X | 20c | dkbrn | Harry Rousseau | .20 |
1939, Aug 15 Panama Canal 25th issue
| - | 20c |
airmail
1929, Dec 31 ovpted
| X | 20c on 2c | car | George Goethals |
1931, Nov 18 1931 airmail issue
| - | 20c | redvio | plane over Gaillard Cut |
1964, Aug 15 Panama Canal 50th issue
| - | 20c | redpur & blk | Jet over Gaillard Cut |
1965, Jul 15 1965 airmail issue unwmk p. 11
| - | 20c | lil & blk | zone seal & jet plane | .20 |
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