China. (Mongolia). 1927. Red Band envelope addressed to Kalgan bearing Mongolia Yvert 22, 25c green/ black tied by Ulan Bator double ring '14th Nov 27', routed via the Russian Post Office Chita, mixed with China SG 315, 4c olive tied by Harbin date stamp '20th Nov' and Kalgan arrival. Lovely item. Ex Peter Holcombe.