Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 3
Lot 1372:
Description
1918, violet overprint 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 upright overprint, Bulat #271, var
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