6c-24c 1918-23 Air Post (C1-C6).
18 multiples, including C3 block of ten with top arrow, double plate no. and blue "top", two blocks of four of C3 and three each of C5 and C6, plate blocks of six of C2 and C4, some stamps Mint N.H., few with small faults, overall Fine-Very Fine, Scott Retail in excess of
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