Lot
989 
Airmail, 1918, 16¢ green. Tied by "Air Mail Service, Wash. N.Y. Phila, Washington, Jul 15, 1918" first flight postmark on Aerial League legal size corner card cover to Brooklyn, light vertical file fold through stamp, Fine; with 1994 P.S.E. certificate. Scott No. C2 Estimate $100 - 150.
Realized: $100