Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Thursday, October 27, 2022 at 3:00 PM UTC
Lot 139:
1929-30, blue surcharge 50c on 75c brown orange, three stamps with varieties: Airplane inverted, French and Arabic surcharge inverted and Airplane doubled, full OG, NH (2) or LH, VF, SG #152b, c, d, £510 as hinged, Est. $250-$300, Sc. # C37a, b, d
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