| Issuer: Bulgaria
Date: 7/15/1975 (1975 sheets) INCOMPLETE Block 1 (0, 0 x 0) |
External links: Colnect 418206..y_Apollo-Soyuz Record of changes |
| Issuer: Bulgaria
Date: 7/15/1975 (1975 sheets) INCOMPLETE Block 1 (0, 0 x 0) |
External links: Colnect 418206..y_Apollo-Soyuz Record of changes |
