The collection consists of one (1) 20x30" black-and-white photographic poster featuring the Boeing Model 40B (Tail number C 286), circa 1920s-1930s. The poster is cardboard-backed and has "W. E. Boeing [as before?] [illegible] 11.00 [Hoge?] 1128" handwritten in pencil on the reverse. The aircraft is in flight with unidentified mountains behind it and has "U.S. Mail C.A.M. 18" printed on the fuselage next to the Boeing Air Transport logo.

Eddie Hubbard was an early aviator and Boeing airmail pilot. The collection includes visual and textual materials that document his career.

Steve A. Stimpson was a manager for Boeing Air Transport in the 1920s-1930s. The collection contains one hundred and fifty-two (152) black-and-white photographs in an unbound photograph album documenting early United Airlines history.