Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1269:
1918, violet overprint (Arnold type 1) on imperforate 15k and 7r, two well margined singles, full OG, LH or previously hinged, VF and scarce stamps, expertized by J. Bulat and Dr. Seichter, C.v. $159++,Bulat#116, 118
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