Worldwide Air Post Stamps and Postal History, One Man Collection of Tannu Tuva, Philatelic Rarities of the World, Part 2
Lot 1107:
Description
1918, violet overprint (type 2a) on 25k green and violet, block of four, bottom right stamp with inverted overprint, full OG, NH, VF and rare multiple, each stamp expertized by J. Bulat, C.v. $500 as four stamps with common upright overprint, Est. $300-$400, Bulat #271, var
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