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Verified Auction Record
U.S. Air Mail plate blocks: C-7 four blocks of six and two blocks of four; C-10 one block of four; C-11 PB of six with two PB numbers and a double ''TOP
Description
U.S. Air Mail plate blocks: C-7 four blocks of six and two blocks of four; C-10 one block of four; C-11 PB of six with two PB numbers and a double ''TOP''
