[Lear Developments radio receiver]

Composite photograph of a Lear Developments radio receiver, showing views of the internal components and the external case, circa 1931-1939. The caption notes that this device was developed for the U.S. Department of Commerce.

Typed caption on verso: "U. This is, I believe, a Dept. of Commerce aircraft receiver designed for loud speaker operations and headphones, which covered the bands of 200-400 and 500-1500 KC in three bands."