| Issuer: Bulgaria
Date: 8/5/1974 (1974 sheets) INCOMPLETE Block 1 (0, 0 x 0) 0, 0: 28s d=UPU emblem (1974 Bulgaria) |
External links: Colnect 411168.._Union_Centary Record of changes |
| Issuer: Bulgaria
Date: 8/5/1974 (1974 sheets) INCOMPLETE Block 1 (0, 0 x 0) 0, 0: 28s d=UPU emblem (1974 Bulgaria) |
External links: Colnect 411168.._Union_Centary Record of changes |
