unused Block of Four Air Post, 1926-44, accumulation of 42 mostly better plate no. blocks of four or six, 20 different items, many never hinged, better items incl. nos. C7-C9, C10 (four), C12 (four), C20-C22, C24 (four) and C31 (four), a few have h.r., minor faults or small separations, otherwise fine-very fine lot, Scott retail $3,054.45