Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 905:
1938, Second Trans-Atlantic Flight, 10k claret, balanced margins imperforate single, full OG, VLH, VF and scarce, expertized by Z. Mikulski, C.v. $825, Est. $500-$600, Scott #640a
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