Bidspirit auction | Soviet Union - Definitive Stamps

Soviet Union - Definitive Stamps on Paper w/o Watermark - 1936-37, factory worker 10k dark blue, horizontal imperforated pair with enlarged margins at top and at sides, full original slightly dry gum, NH, VF and scarce in pair, P. Buchsbayew certificate, Est. $1,200- $1,500, Scott #616b