| Issuer: Mongolia
Date: 6/1/1977 (1977 sheets) INCOMPLETE Block 1 (0, 0 x 0) |
External links: Colnect 247977.._Childrens_Day Record of changes |
| Issuer: Mongolia
Date: 6/1/1977 (1977 sheets) INCOMPLETE Block 1 (0, 0 x 0) |
External links: Colnect 247977.._Childrens_Day Record of changes |
