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postage
1990, Jun 15 75th Anniversary of Arab Scout Movement issue (no wmk info) (no perf info)
| - | 850f | multi | — | — |
1991, May 22 1st Anniversary of Yemen Republic issue
| - | 850f | multi | — | — |
1991, May 22 Signing of Unity Agreement in 1989 issue
| - | 850f | multi | — | — |
1991, May 31 World Anti-smoking Day 1991 issue
| - | 850f | multi | — | — |
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