Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 1165:
1918, black overprint (type 1) on 7k light blue, three side margin horizontal strip of five, side stamps with double overprints and extra sideways overprint on margin, full OG, NH or LH(1), VF, ex-Dr. Zelonka, C.v. $205++, Bulat #666, a
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