unused Block of Four Air Post, 1918-69, small accumulation of singles, blocks of four and plate no. blocks, better singles incl. nos. C4-C6 and C18, blocks of nos. C1, C4 and C18, plate no. blocks of nos. C7-C10, C20-C22, C24, C25-C31 and C46, many never hinged, some duplication, usual mixed condition, generally fine-very fine lot, Scott retail $2,270.05