Stamps, overprinted on stamps of 639
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Penrhyn
postage1990, Dec 5 Birdpex 90 issue ovpted on stamps of Penrhyn to delete catnums unwmk (no perf info)
| X | $1.50 on 55c | — | — | |||
| X | $1.50 on 65c | Solitary Sandpiper (Audubon) | — | — | ||
| X | $1.50 on 75c | — | — | |||
| X | $1.50 on 20c | harlequin duck | — | — |
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