Lot
1558 
Airmail, 1918, 16¢ green. Nicely centered, tied by light Washington D.C. oval and purple "Airmail Service Wash. N.Y. Phila., Washington, Jul 15, 1918" cds on first flight cover to New York City, Very Fine. Scott No. C2 Estimate $600 - 800.
Realized: $675