Philippine 1917 12c Lincoln (295) & 1926 4c Legislative Palace (320) tied by diminutive air plane cancels (type 2) on Washington's Birthday Exhibition Flight #20a (old #22) by Philippines Airways, Inc. from Paranaque Field, Manila, 2-22-28, to Corregidor, Bataan, Bulacan & return with Manila, 2-22-28, receiver. Pilot was Alfred J. Croft. Also with Special cachet type 22. Very Scarce flight, Only 60 letters and regular cards carried! Very Fine & Attractive cover with small tear at top.