Photograph of the fuselage of the Learjet 23 prototype, July 31, 1963. Inscription on verso: "P5-E / July 31, 1963 / Showing aft section joined onto forward fuselage."
Photograph of people attaching the aft and forward fuselage sections of the Learjet 23 prototype, July 31, 1963. Inscription on verso: "P5-H / July 31, 1963 / Attaching aft fuselage section to forward fuselage section."
Photograph of people attaching the wing to the Learjet 23 prototype, August 8, 1963.Inscription on verso: "P6-B / Aug. 8, 1963 / Mating and attaching wing to fuselage."
Photograph of the Learjet 23 prototype undergoing fuel tests at the Lear Let plant in Wichita, Kansas, circa 1963.Inscription on verso: "Fuel tests."Stamped on verso: "Sep. 6, 1963."