Historic Airmail Press Photo, Signed by Pilot and Postmaster General - 1918

Large 8x10" b&w press photo with International Film Service rubber stamp on back; press release remnants but release in missing.  Pictured is pilot Max Miller (in helmet and goggles), Postal Superintendent Benjamin Lipsner in front cockpit and U.S. Postmaster General A.S. Burleson holding the straw bowler and empty mail bag in front of Lipsner.  Both Max Miller and A.S. Burleson have signed in black ink upper left.  The event being celebrated is the Sept 5, 1918 airmail flight.  About good + condition; two corner chips and one small lower margin chip.