Stamps of Yemen, 4 base month
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postage
1939, Apr 28 Arab Alliance 2nd issue wmk. Arabic chars & YG (no perf info) (6 stamps)
| - | 4b | — | — | |||
| - | 6b | — | — | |||
| X | 10b | — | — | |||
| X | 14b | — | — | |||
| X | 20b | — | — | |||
| X | 1i | — | — |
1960, Apr 7 World Refugee Year issue (no wmk info)
| X | 4b | brn | refugees | — | — | |
| X | 6b | yelgrn | refugees | — | — |
1971, Apr 4 UN 25th issue
| - | 5b | — | — | |||
| - | 7b | — | — | |||
| - | 16b | — | — |
1981, Apr 1 world tourism conference issue (5 stamps)
| - | 25f | — | — | |||
| - | 75f | — | — | |||
| - | 100f | — | — | |||
| - | 135f | — | — | |||
| - | 160f | — | — |
2002, Apr 27 Second Intifada issue
| - | 30r | multi | Muhammad al-Durrah | — | — | |
| - | 60r | multi | Eiman Hajjo | — | — |
2002, Apr 30 75th Anniversary of Yemen Boy Scouts issue
| - | 30r | multi | — | — | ||
| - | 60r | multi | — | — | ||
| - | 70r | multi | — | — | ||
| - | 160r | multi | — | — |
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