1918 Washington D.C. - New York, N.Y. via Philadelphia, Pa. First flight cover franked with 24¢ Airmail (s.e. at top) tied by "New York, N.Y., May 14" slogan postmark, red "Air Mail Service, New York, First Trip, May 15, 1918" postmark and receiving postmark, Very Fine. AAMC No. 101q. Scott No. C1  $750. $0 (Image)

1918 Washington D.C. - New York, N.Y. via Philadelphia, Pa. Naval Aircraft Factory corner card cover franked with 12¢ Wash-Frank, two singles (s.e.'s at right) tied by Philadelphia, Pa. machine postmark and "Air Mail Service, Phila., May 18, 1918" flight postmark, Very Fine. Estimate  $200 - 300. $0 (Image)