Lot   Cat.#
797    C23a
1931, Airship over the Arctic Region, 50k dark gray blue, error of color, used on registered flown cover from Leningrad to Italy in 1941 together with six other air post values, including Civil Aviation, complete set of five, appropriate markings and arrival ds on reverse, mostly F/VF

Stamp Auction #83, September 13, 2019. Raritan Stamp, Inc