Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2

Soviet Union 1941-91

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Start price: $750

Buyer's premium:

1964, Conquest of Space, souvenir sheet of six stamps of 10k multicolored on ordinary paper, light blue color (text at right – ”1964. Pochta USSR”) with double impression, full OG, NH, VF and rare unrecorded error, a common sheet is included for comparison, Raritan Stamps guarantee, Est. $1,200- $1,500, Scott #293 var