- | 18c | desertification | .20 |
- | 18c | .20 |
- | 18c | .20 |
- | 18c | FW de Klerk | .20 |
- | 18c | .20 |
- | 18c | multi | Cahora Bassa Dam & map of southern Africa | .20 |
X | 18c | Sam Nujoma & map & flag |
X | 18c | Fish River Canyon |
X | 18c | Early central business area |
- | 18c | multi | .20 |
- | 18c | multi |
- | 18c | multi | Elanus caeruleus |
- | 18c | multi |
- | 18c | multi |
- | 18c | — | — | |||
- | 18c | multi | Euplectes progne (1989) |
- | 18c | multi |
- | 18c | multi |
- | 18c | multi |
- | 18c | multi |
- | 18c | — | — |
- | 18c | multi |
- | 18c | — | — |
- | 18c | multi | Scomber japonicus |
- | 18c | — | — |
- | 18c | multi | Ficus sur |
- | 18c | multi | Ginkgo koningensis |
- | 18c | multi | Aretaios |
- | 18c | multi | Dendroaspis polylepis |
- | 18c | multi |
- | 18c | multi | Bucorvus cafer |
- | 18c | multi | .20 | .20 |
- | 18c | multi |
- | 18c | Beechcraft 1900 | — | — |
- | 18c | barchan dunes | — | — |
- | 18c | suffrage | — | — |
X | 18c | boltwoodite | .20 | |||
- | 18c | boltwoodite new formula (1990) | — | — |
- | 18c | multi | Adenium boehmianum | — | — |