Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3
Lot 1365:
SELECTION OF MAINLY PERFORATION VARIETIES: 1955-58, Moscow University 40k, Trade Union Congress 40k, Crimea Observatory 40k, Moscow North Pole Flight red overprint on 2r, all with perforation L12½, IGY of 1958, set of 3 with comb perforation, both types of M. Aivazov, full OG, NH, VF and guaranteed genuine, Est. $150-$200, Sc. # 1786/2094, C96 var
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