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[Radial motor on test block]
Photograph of a radial motor and propeller mounted on a test block, Dayton, Ohio, 1915. Inscription on verso: "Dayton Ohio - 1915. Radial motor on test block."
[Anzani aircraft motor on test block]
Photograph of an [Anzani?] aircraft motor on a test block, Dayton, Ohio, circa 1919.Inscription on verso: "Dayton Ohio -- 1919 / [Anzani?] 6 cyl. 60 HP motor on test block."
[Anzani aircraft motor]
Photograph of an [Anzani?] aircraft motor on a test block, Dayton, Ohio, circa 1919. Inscription on verso: "Dayton Ohio - 1919 / Anzani motor on test block."
[Aircraft engine]
Photograph of an aircraft engine, Dayton, Ohio, circa 1925. Inscription on verso: "Dayton O. 1925 / [illegible] showing motor mount."
[Aircraft engine]
Photographic negative of an aircraft engine, Dayton, Ohio, circa 1925.
[De Havilland D.H.4 aircraft engine]
Photograph of a De Havilland D.H.4 aircraft engine, Ohio, circa 1922. The verso inscription notes that the engine was part of an Army aircraft that had a hard landing at Blue Ash Field. Inscription on verso: "Cincinnati Ohio -- 1922 / Motor of Army D. H. after hard landing at Blue Ash Field."
[Unidentified aircraft engine]
Photograph of an unidentified aircraft engine, circa 1923. Image taken at the 1923 International Air Races in St. Louis, Missouri.Part of a photograph album related to the career of Walter E. Lees and other early aviators, circa 1923-1924.