Bidspirit auction | Soviet Union Stamps of 1924-40

Soviet Union Stamps of 1924-40 - 1939-43, definitive issue, aviator 30k dark blue, typo printing, two stamps of ''peace'' and ''war'' (cream paper, so-called Chelyabinsk print) issues in blocks of four, both have comb perforation, full OG, NH, VF, Est. $150-$200 , Sc. #736 var