Stamps of British Guiana, 12.5x13 perf
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postage
1863 1863a issue (no wmk info) p. 12.5x13
| - | 2c | org | seal of British Guiana | |||
| - | 8c | rose | seal of British Guiana | |||
| - | 12c | lil | seal of British Guiana |
1863 1863b issue
| - | 6c | bl | seal of British Guiana |
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