Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 883:
Description
1928-33, 3rd Soviet issue, black surcharge 25k on 300r green, vertical gutter block of four; 6th Soviet issue, red surcharge 25k on 70k brown, top right stamp with omitted ”kop” at right, both with full OG, NH, VF, first one with I. Kirzhner certificate, Standard Cat.#PE16, PE23, var, Est. $200-$250
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