| Issuer: Mongolia
Issue: 40th Anniversary of the People's Revolution b Date: 6/20/1961 (1961 sheets) INCOMPLETE Block 1 (0, 0 x 0) |
Prev: Mongolia 40th Anniversary of Mongolian Postal Service, empty sheet (#16760)
Next: Mongolia 40th Anniversary of the People's Republic of Mongolia c, empty sheet (#16762) External links: Colnect 242545..ution_40_years |
