Bidspirit auction | Soviet Union Stamps of 1924-40

Soviet Union Stamps of 1924-40 - 1933, Baku Commissars, trial color perforated proof of 40k in brown, printed on paper with watermark Borders and Rosettes, perforated vertically L13¾ and imperforated at top and bottom, black crayon cancellation, full OG, previously hinged, VF, Est. $600-$800, Sc. #523