Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 83:
1930, Trans-Atlantic Squadron, 7.70L deep blue and gray, left sheet margin block of four, stamp with ”Seven Stars” variety at the bottom right, perfect quality, full OG, NH, VF, rare and desirable positional piece, each stamp signed by A. Bolaffi with his certificate for block of nine (error is in the middle), C.v. $6,700 as singles, Sassone #A25, a, C.v. €13,625, Est. $3,000-$3,500, Scott #C27, a
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