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airmail
1972, Jul 20 World Telecommunications Day issue unwmk p. 12x11.5
| - | 60m | multi |
1976, Mar 20 40th Anniversary of Mongolian Meteorological Office issue
| - | 60m | multi |
1977, Jun 15 50th Anniversary of Unions in Mongolia and the 11th Mongolian Trade Unions Congress issue
| - | 60m | multi |
1981, Oct 5 50th Anniversary of "Graf Zeppelin" Polar Flight issue (7 stamps)
| - | 20m | multi | Haliaeetus albicilla | |||
| - | 30m | multi | ||||
| - | 40m | multi | ||||
| - | 50m | multi | Ursus maritimus | |||
| - | 60m | multi | ||||
| - | 80m | multi | Fratercula arctica | |||
| - | 1.20t | multi |
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