Stamps of Nigeria - Biafra, 1sh6p denom
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postage
1968, Sep 2 Butterflies issue - Butterflies (1968) (no wmk info) (no perf info)
| - | 1sh6p | multi | Papilio antimachus, Ipomoea involucrata | — | — |
1968, Oct 1 Olympics 1968 issue
| - | 1sh6p | multi | — | — |
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