U.S.; Airmail Issues, 1930 Graf Zeppelin Set, Blocks of 4, #C13-C15, N.h. marginal pl. # blocks, gum bends, 65¢, $1.30 fine-very fine, $2.60 one with gum ships, fine, Fine to Very Fine. Scott $9,800+. Estimate $3,000-4,000.
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