Stamps of Yemen, 18 base day
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postage
1990, Sep 18 Ducks 1990 issue - ducks (1990 Yemen) (no wmk info) (no perf info) (8 stamps)
| - | 10f | multi | Anas acuta | — | — | |
| - | 20f | multi | Anas penelope | — | — | |
| - | 25f | multi | Tadorna ferruginea | — | — | |
| - | 40f | multi | Gadwall | — | — | |
| - | 75f | multi | Tadorna tadorna | — | — | |
| - | 150f | multi | Anas clypeata | — | — | |
| - | 460f | multi | Anas acuta | — | — | |
| - | 600f | multi | Anas crecca | — | — |
1991, Mar 18 Mushrooms 1991 issue - mushrooms (1991 Yemen) (7 stamps)
| - | 50f | multi | Boletus aestivalis | — | — | |
| - | 60f | multi | Suillus luteus | — | — | |
| - | 80f | multi | Gyromitra esculenta | — | — | |
| - | 100f | multi | Leccinum scabrum | — | — | |
| - | 130f | multi | Amanita muscaria | — | — | |
| - | 200f | multi | Boletus erythropus | — | — | |
| - | 300f | multi | Leccinum testaceoscabrum | — | — |
1996, May 18 China '96 issue
| - | 80r | multi | — | — |
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