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[Learjet 23 prototype at Lear facility]
Photograph of the Learjet 23 prototype at a Lear facility, September 10, 1963. Other aircraft undergoing construction and testing are visible in the background.Inscription on verso: "P 15-D / Sept. 10, 1963."
[Man working on wing section of Learjet 23 prototype]
Photograph of a man working on the wing section of the Learjet 23 prototype, July 25, 1963. The forward fuselage section is visible in the background.Inscription on verso: "P3-E / July 25, 1963."
[People attaching tail section to Learjet 23 prototype]
Photograph of people attaching the tail section to the Learjet 23 prototype, September 9, 1963. Inscription on verso: "P 14-J / Sept. 9, 1963."
[People attaching tail section to Learjet 23 prototype]
Photograph of people attaching the tail section to the Learjet 23 prototype, September 9, 1963.Inscription on verso: "P 14-G / Sept. 9, 1963."
[People attaching wing to Learjet 23 prototype]
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."
[Fuselage of Learjet 23 prototype]
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."
[Men looking at door of Learjet 23 prototype]
Photograph of two men looking at the door of the Learjet 23 prototype, February 18, 1964. A third man is visible inside the aircraft performing a test with an oscillograph.Inscription on verso: "Direct read out oscillograph loaned from Century Instrumentation used during flight test. Buzz Nanney [illegible] of head. / PR-98B / 2-18-64."
[Learjet 23 prototype undergoing fuselage side-bending test]
Photograph of the Learjet 23 prototype undergoing a fuselage side-bending test, February 25, 1964. Text on sign: "Fuselage side bending static test / 67% ultimate / 25 Feb. 2964."Inscription on verso: "Gene Koenig / middle white shirt / T-58-4E / 2-25-64."
[Learjet 23 prototype undergoing fuselage side-bending test]
Photograph of the Learjet 23 prototype undergoing a fuselage side-bending test, February 25, 1964. Text on sign: "Fuselage side bending static test / 0% ultimate / 25 Feb. 2964."Inscription on verso: "T-58-4C / 2-25-64."
[Learjet 23 prototype undergoing fuselage up-bending test]
Photograph of the Learjet 23 prototype undergoing a fuselage up-bending test, February 13, 1964.Text on sign: "Fuselage up bending static test / 100% ultimate / 13 Feb. 1964."Inscription on verso: "T58-1-C / 2-13-64."