Photograph of an unidentified man attaching a heater hose to the engine of a Douglas A-26 (B-26) Invader aircraft at a snow-covered airfield, circa 1940s.
Inscription on verso: "Warming up a B-26."
Photograph of the technical staff of the Scottish Aircraft and Engineering Company standing in front of a Burnelli (Upperçu-Burnelli) UB-14 aircraft, New Jersey, circa 1930s.
Typed in margin: "British Burnelli-UB 14. Scottish Aircraft and Engineering…