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Photograph of a Lear Jet Remote Status Alarm Module and a scale model of a Learjet aircraft, circa 1960s-1970s. Typed caption: "Remote Status Alarm Module -- Vandenberg AFB. / Delivered 5-69." Stamped on verso: "Lear Jet Photo."

Photographic slide of a Lear Jet Noise Suppressor installed on the engine of a Learjet 23 aircraft, circa 1960s-1970s.Inscription on slide mount: "Lear Jet Noise Suppressor / P-55."

Photographic slide of a Lear Jet Noise Suppressor, circa 1960s-1970s.Inscription on slide mount: "LJ Noise Suppressor."

Photograph of Paul Mantz (left) and Mike Sutton (right) watching as William P. Lear jumps on a piece of windshield material to demonstrate its durability, circa 1960s.Inscription: "'Don't tell me it can't be done.' / Paul Mantz / Capt. Mike Sutton."

Photograph of two men watching as William P. Lear jumps on a piece of windshield material to demonstrate its durability, circa 1960s.Inscription on verso: "WPL - 6LT01 / Lear Avia Archive / WPL jumping on Lear Jet windshield material to show…

Memorandum to Lear Jet employees from Bob Hagan, Manufacturing Superintendent and Chief of Flight Test, October 9, 1963. Sends thanks and congratulations to employees for a job well done and shares highlights from the test flight of the Learjet 23.…

Note from William P. Lear, circa 1960s. Expresses his thanks and appreciation "to each and every one of you" (likely referring to Lear Jet employees) for efforts related to Learjet 23 production. References the aircraft's first flight. One…