Stamps of Mongolia, sailing ships (1981 Mongolia) design type, missing design, not overprinted
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postage
1981, Aug 1 sailing ships (1981 Mongolia) unwmk p. 12 (6 stamps)
| - | 10m | multi | Egyptian 15th century BC | |||
| - | 20m | multi | Mediterranean 9th century | |||
| - | 40m | multi | Hansa Cog 12th century | |||
| - | 50m | multi | Venitian 13th century | |||
| - | 1t | multi | Poltava 18th century | |||
| - | 1.20t | multi | US schooner 19th century |
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