Lot
1414 
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.
Realized: $425