Stamps of South West Africa, 18c denom
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postage
1989, May 18 aviation 75th issue - maps&aircraft wmk. RSA in triangle (no perf info)
| - | 18c | Beechcraft 1900 | — | — |
1989, Aug 14 sand dunes
| - | 18c | barchan dunes | — | — |
1989, Aug 24
| - | 18c | suffrage | — | — |
1989, Nov 16 1989 issue
| X | 18c | boltwoodite | .20 | |||
| - | 18c | boltwoodite new formula (1990) | — | — |
1990, Feb 1 plants (1990 South West Africa)
| - | 18c | multi | Adenium boehmianum | — | — |
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