Bidspirit auction | Soviet Union Stamps of 1924-40

Soviet Union Stamps of 1924-40 - 1925, Lenin Mausoleum, 7k-40k, imperforated complete set of four used on registered cover from the 1st All-Union Philatelic Exhibition in Moscow, addressed to Saratov, tied by special Exhibition date stamp, arrival ds is on reverse, mostly VF, Est. $150-$200, Sc. #294-97