1925, Scepter of Indra, two stamps of 5c and 20c used on native cover from Urga (Ulan Bator) to Tientsin via Troitskosavsk (Kyakhta) and Manchuli, tied by Urga ''19.12.25'' square ds, no postage dues applied upon arrival to China, but with Soviet 10k blue, probably posted in Troitskosavsk and remained uncancelled, various postal markings and Tientsin ''3.Jan.26'' arrival, mostly VF and an interesting item (Image)

1931, two surcharged values 5m on 5c violet and 20m on 20c yellow brown paid for delivery in Mongolia for red-band cover sent from Ulan Bator to Kalgan (now - Zhangjiakou), upon arrival to China marked with boxed ''T'' and uprated by two Chinese dues of 20c and 30c, mostly VF (Image)

1959, Mongolian Youth Festival, 30m lilac and light blue, strongly misperforated error, CTO with full OG, VF, a common stamp is included (Image)

1959, Mongolian Language Congress, 40m multicolored, right sheet margin block of four, imperforated vertically between stamps and on the right, full OG, NH, VF, C.v. $300++ (Image)

1959, Congress of Rural Economy, 30m green, top left corner margin single, imperforated on the left, full OG, NH, VF (Image)