Bidspirit auction | Soviet Union Stamps of 1924-40

Soviet Union Stamps of 1924-40 - 1939, Agriculture Exhibition, 1r blue, comb perforation 12x12½, raster vertical diamonds, neatly cancelled at top right corner, fine and extremely rare raster and perforation variety, which is known only in used condition, just a few stamps recorded, Est. $1,500-$2,000, Sc. #733 var