Philippine 1917 6c Magellan (292, two different shades) & 1926 4c Legislative Palace "OFFICIAL" overprint (O2) tied by diminutive air plane cancels (type 3) on U.S. Army Photographic and Exploration flight #24c (old #28) from Aparri, 5-15-28, to Manila, with red flight cachet (type 21) dated 5-15-28, and Manila (5-15) duplex backstamp. Scarce flight, Only 83 letters carried! Very Fine & Attractive cover!