Browse Items (60 total)

Photograph of a Lear Developments aircraft transmitter, circa 1931-1939. The verso caption notes that this transmitter was developed for the Flight International Corporation and describes the device's components and specifications.Typed caption on…

Photograph of a Lear Developments BC-190-T5 radio transmitter, circa 1940. The verso inscription notes that this transmitter was developed for the U.S. Army Signal Corps and describes the device's components and specifications.Inscription on verso:…

Photograph of a Lear Developments Type T-120 transmitter, circa 1936-1939. The caption on verso notes that transmitter was developed for the Royal Canadian Air Force and describes the device's components and specifications. Caption on verso: "J. This…

Photograph of Learadio radio and navigation equipment, consisting of a transmitter, receiver, and direction finder, circa 1936-1939. The verso caption notes that this equipment was developed by "myself" (William P. Lear) and Reeder Nichols for the…

Photograph of a Lear device, circa 1931-1939.

Photograph of a Lear radio compass, circa 1931-1939.

Photograph of a Lear device, circa 1931-1939.

Photograph of the internal components of a Lear device, circa 1931-1939.

Composite photograph of a Lear Developments telephone transmitter, showing views of the internal components and the external case, circa 1931-1939. The verso inscription, which was written by William P. Lear, states that this was the first 3105-3120…

Photograph of a Lear Developments special aircraft receiver and remote control unit (radio transmitter Type L-35S-1), circa 1931-1939. The verso caption notes that the receiver was developed for the Ontario Forestry Branch and describes the device's…