Bidspirit auction | One Man Collection of Tannu

One Man Collection of Tannu Tuva - Second Air Post issue - 1936, Dirigible over Horseman, 25k violet and cream, compound perforation 14x14x14x10 with extra horizontal perf 14 at top, full OG, LH, VF and very rare, Est. $400-$500 , Scott #C13b var