Wireless telegraph trench set transmitter, continuous wave Mark III*, No. 3470. made at the Wireless Telegraph Factory, Soho

Kamm's Zerograph keyboard type telegraph transmitter and receiver

Poulson arc transmitter

Station kit, transmitter receiver radio no. 123 in a wooden box painted dark green, part of a clandestine radio station, British, 1955

Breguet electric telegraph transmitter

Spark gap transmitter with Morse key and induction coil, part of a demonstration wireless telegraphy set, by George Carette and Co., Nuremburg, Germany, c. 1900

Wheatstone automatic telegraph transmitter with electric motor, 1880 - 1890

Replica Bell liquid transmitter consisting of a metal cone painted black held in a brass ring on three legs and mounted on a wooden base with a brass cup at centre, by Peter Abel and Eric Clayton, Norwich, January 1976

Johnson's carbon pencil telephone transmitter in wooden case with terminal connections, invented by W. Johnson, Sheffield, 1880

Solid back telephone transmitter with clear mica front cover, in wooden case with terminal connections, c. 1890