1959, Mongolian Language Congress, 40m multicolored, right sheet margin block of four, imperforated vertically between stamps and on the right, full OG, NH, VF

POSTAL HISTORY GROUP: 1958-63, five envelopes, three of which are illustrated ones, three of solo franking and one - bearing eight values, all sent from Ulaanbaatar, three addressed to China, one - to Soviet Union and one - to England, appropriate markings, mostly VF