ARDENTE HEARING AID, 1940's
Early hearing aid using 3 miniature valves, driving a headphone from an internal microphone.
Add a memory or information about this object
The company was formed in 1919 and sold Hearing Aids imported from the continent. The company started to manufacture their own and the name 'Ardente' was first used by them in 1937/9.
They also made alarm systems.