Bidspirit auction | Soviet Union Stamps of 1924-40

Soviet Union Stamps of 1924-40 - 1924-25, definitive issue, worker 20k gray green, typo printing, top left corner sheet margin horizontal pair with a part of control inscription, invalidating perforation across the design, perfect quality, full OG, NH, VF and a spectacular item, Est. $500-$600, Sc. #288 imp