Airmail, 1918, 24¢ carmine rose & blue, "High Flying Plane", vignette shifted up and to the left, natural s.e. at top, used with 3¢ purple (501), tied by purple "Airmail Service Wash. N.Y. Phila. 'New York' May 15 1918 First Flight" duplex first flight cover (AAMC 101R cat $750) from New York to Washington D.C., Economist Stamp Co. corner card; vertical file fold, tiny edge tear, F.-V.F., An interesting use of a "low flying fast plane" sent from Warren H. Colson., ex-Gibson. Scott Nos. C3 var.  Estimate $300 - 400. $0 (Image)