Photograph of a Cal-State Air Lines Handley Page H.P.137 Jetstream aircraft (tail number N12224) and a Learjet 25 aircraft (tail number N695LJ) in a hangar, circa 1960s.
Photograph of William P. Lear and Wilbur Nelson seated in an experimental helicopter at the University of Michigan, circa 1960s. Inscription on verso: "WPL, Wilbur Nelson & experimental helicopter at Univ. of Michigan."
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…
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…