| Issuer: Poland
Issue: Space Age 20th Date: 12/28/1977 (1977 sheets) INCOMPLETE Block 1 (0, 0 x 0) 0, 0: 6.90z d=Vostok & Mercury spacecraft |
External links: Colnect 199418..Space_Conquest |
| Issuer: Poland
Issue: Space Age 20th Date: 12/28/1977 (1977 sheets) INCOMPLETE Block 1 (0, 0 x 0) 0, 0: 6.90z d=Vostok & Mercury spacecraft |
External links: Colnect 199418..Space_Conquest |
