unused 6c-24c 1918-23 Air Post (C1-C6), accumulation of 61 unused stamps in various quantities (only one no. C3) and four unused blocks of four, extremely mixed condition, most have o.g., but also incl. disturbed o.g. and regummed stamps, many have faults incl. some reperfed, otherwise fine-very fine lot, Scott retail $4,250.00 est.