U.S.; Airpost, 1918-23, First and Second Issue Sets, Blocks of 4, #C1-C6, #C1-C2 2 o.g., 2 n.h., C3 dist. o.g., C4 and C6 2 o.g. 2 n.h., C5 n.h., Fine to Very Fine. Scott $1,400. Estimate $350.
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