Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 3
Lot 1377:
Description
1918, violet overprint on perforated 10k dark blue, bottom left corner margin block of eight (horizontal pair plus block of six), control No.5 on the edge, offset on reverse, 7 overprints placed sideways in both directions and one stamp has inverted overprint, full OG, NH, VF, Bulat #516, var
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