Mongolia: 1926 Registered cover to Ulan Bator franked on the reverse by first is
Mongolia
1926 Registered cover to Ulan Bator franked on the reverse by first issue 50c. vertical strip of three (each with indistinct boxed native handstamp in violet) in combination with Provisional 10c. optd. "Postage", all tied "TSETSERLIG/MANDAL/25-8-26/MONGOLIA" datestamp, with arrival cds alongside....