Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 1155:
1918, violet overprint (type 1) on 7r black and yellow, printed on vertically laid paper, official reprint, full OG, previously hinged, F/VF, expertized by A. Brun and Dr. Seichter, Est. $100-$150, Bulat #12
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