Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3
Lot 1494:
1918, violet overprint on 1r brown, pale brown and orange, right margin imperforated pair, left stamp has overprint of type 2d, right one – type 2c, full OG, LH, VF, ex- Dr. Zelonka, Bulat #373/347, Est. $100-$150
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