| Issuer: Mongolia
Issue: 100th Anniversary of Discovery of Wild Horse Species by Nikolai Przewalski Date: 5/10/1972 (1972 sheets) INCOMPLETE Block 1 (0, 0 x 0) 0, 0: 4t |
External links: Colnect 245149..alskii_-Horses Record of changes |
| Issuer: Mongolia
Issue: 100th Anniversary of Discovery of Wild Horse Species by Nikolai Przewalski Date: 5/10/1972 (1972 sheets) INCOMPLETE Block 1 (0, 0 x 0) 0, 0: 4t |
External links: Colnect 245149..alskii_-Horses Record of changes |
