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Brochure for the Learadio Model T30-R3AB aircraft transmitter-receiver, circa 1939.
Brochure for the Learadio Model UT-6 radio transmitter, circa 1939.
Pamphlet about Learadio aircraft radio equipment, circa 1930s. Contains technical specifications and images of various models of transmitters, receivers, power supplies, and accessories. 41 pages.