Stamps of United States - Canal Zone, 10 base month
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postage
1962, Oct 12 Thatcher Ferry Bridge opening issue (no wmk info) p. 10v
| - | 4c | blk & sil | Thatcher bridge & map | .20 |
1978, Oct 25 unwmk p. 11
| - | 15c | grn & blgrn | towing locomotive & ship | .20 |
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