United States, Airmail, 1918, 6¢-24¢ first issue complete. Attractive group, including blocks of 4 of 6¢, block of 6 of 16¢ and 4 blocks of 4 of 24¢, including centerline block, and a used 6¢ on piece, stamps F-VF or better, F.-V.F. Scott No. C1-C3  $980. $0 (Image)