No block images found 		Issuer: Mongolia
Block in sheet 16840
Date: 4/28/1981 (1981 blocks)
(4, 1 x 4)
1, 1: 1t d=Mongolia Ulan Bator
2, 1: 1t d=Naposta Stuttgart
3, 1: 1t d=WIPA Vienna
4, 1: 1t d=Japex Tokyo





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