Bidspirit auction | Soviet Union Stamps of 1924-40

Soviet Union Stamps of 1924-40 - 1932, Moscow Philatelic Exhibition, 15k black brown and 35k ultramarine, complete set of two with perforation 12½, in addition 35k with perforation 10½, the last one has very slight offset on reverse, all with full OG, NH, VF, C.v. $244.50, Est. $150-$200, Sc. #485-86, 486a