Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 977:
Description
1929, Pioneer’s Assembly, 10k brown and 14k slate gray, complete set in horizontal pairs, used on registered cover from Kharkov to England, blue crayon cross as always on registered mail, F/VF, Est. $200-$250, Scott #411-12
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