The 4th Agricultural Co-operative Congress, Ulan Bator - National Museum Stamp of 1969 Overprinted 1973
现在展示： 蒙古共和国 - （通用）邮票 - 1973 - The 4th Agricultural Co-operative Congress, Ulan Bator - National Museum Stamp of 1969 Overprinted - 1 邮票.
![[The 4th Agricultural Co-operative Congress, Ulan Bator - National Museum Stamp of 1969 Overprinted, 类型 SX1]](https://www.stampworld.com/media/catalogue/Mongolia/Postage-stamps/SX1-s.jpg)
现在展示： 蒙古共和国 - （通用）邮票 - 1973 - The 4th Agricultural Co-operative Congress, Ulan Bator - National Museum Stamp of 1969 Overprinted - 1 邮票.
