Lot 396
 
Airmail, 1918, 16¢ green (C2), set of all three first flight legs from Washington, D.C., Philadelphia and New York, each tied by corresponding "Air Mail Service Wash. N.Y. Phila., Jul 15, 1918" duplex on cover. Fine and scarce set of first flight covers.
Scott $2,400
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| Realized $650 |
