Stamps of United States - Canal Zone, 12 base month
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postage
1904, Dec 12 1904c issue ovpted on stamps of Panama (no wmk info) (no perf info) (5 stamps)
| X | 1c | on 1c (17) | ||||
| X | 2c | on 2c (15) | ||||
| X | 5c | on 5c (27) | — | — | ||
| - | 8c | on 50c (15) | — | — | ||
| - | 10c | on 10c (31) | — | — |
airmail
1929, Dec 31 ovpted
| - | 10c on 50c | lil | Blackburn |
1929, Dec 31 ovpted
| X | 20c on 2c | car | George Goethals |
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