Stamps of Gambia, 1986, missing perf, not overprinted
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postage
1986, Apr 18 Halley's Comet issue unwmk (no perf info)
| - | 10b | multi | Maria Mitchell | — | — |
1986, Dec 21 Halley's Comet b issue (6 stamps)
| - | 20b | multi | ||||
| - | 75b | multi | ||||
| - | 1d | multi | ||||
| - | 2d | multi | ||||
| - | 10d | multi | ||||
| - | 10d | multi | — | — |
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