Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1260:
1918, violet overprint (Arnold type 1) on perforated 15k, 20k/14k and 50k, imperforate 35k (horizontal pair) and 7r, full OG, mainly LH, VF, ex-Dr. Zelonka, C.v. $233, Bulat #11/18
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