Stamps of Oman, 12.75x12.25 perf
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postage
1989, Dec 18 10th Supreme Council Session of Arab Co-operation Council issue unwmk p. 12.75x12.25
| - | 50b | multi | — | — | ||
| - | 50b | multi | — | — |
1990, Jan 1 5th Anniversary of Gulf Investment Corporation issue
| - | 50b | multi | — | — | ||
| - | 130b | multi | — | — |
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