Auction 90, Session 2 - Worldwide Rare Stamps and Postal History
Lot 1108:
1927, International Air Post Conference at the Hague, 10k and 15k, complete set of two in vertical right sheet margin pairs, bottom stamp of 15k with broken ”A” in ”AVIO” variety, full OG, NH, VF, Est. $250-$300, Sc. #C10-11, var
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