Bidspirit auction | Soviet Union stamps of 1923-32

Soviet Union stamps of 1923-32 - 1927, black surcharges (type I) 8k on Postage Due stamps of 1k-14k, complete set of seven printed on watermarked paper, cross-gutter blocks of 16, post office fresh quality, full OG, NH, VF and an eye-catching unit , Sc. #366-72