Bidspirit auction | One Man Collection of Tannu

One Man Collection of Tannu Tuva - Black, Brown or Blue Surcharges on the Pictorial issue - 1932, black instead of brown surcharge 2k on 50k black, green and red brown, vertical bottom sheet margin pair, perforation 10, full OG, NH, VF and very rare, only one sheet of 100 stamps was found, Est. $1,000-$1,200 , Scott #30 var