24c Carmine Rose & Blue, 1918 Air Post (C3).
Position 10 (first printing), the only position on the sheet of 100 with natural s.e. at top and right, tied by magenta "Air Mail Service Wash. N.Y. Phila. New York May 15, 1918 First Trip" datestamp on 3c entire to Philadelphia, bold pencil "Air Mail",
Philadelphia May 15 receiving backstamp, slightly reduced at right, small scuffs at bottom corners, slight ink smudges on stamps, still Fine, a nice example of the magenta New York "First Trip" datestamp, also shows how the public was confused about the rate (24c plus 3c is incorrect -- the rate was 24c, inclusive of regular postage and special delivery fee)
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