Lot 1660
 
1918 (May 15) Washington, D.C. — Philadelphia first flight (AAMC 101B1), 7¢ 8¢ & 9¢ Franklins on blue "Aerial Mail Service" vignette and tied by Washington, D.C. "First Trip" duplex on cover to Philadelphia, pink "Special Aero Mail" label at lower left, backstamped Philadelphia, 3 PM; also on reverse manuscript "Envelope made by John Wanamaker, one-time Postmaster General of U.S.A." and a "Help Humble the Hun" patriotic label published by the Y.M.C.A. School of Airplane Construction showing a U.S. biplane dropping bombs, F-VF. AAMC $450.
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| Realized $1,300 |
