GEC K 197
Consisting of 'Hunningscone Deckert' Microphone. Double Pole Bell Receiver, Induction Coil, Ringing Key, Call Bell, Automatic Switch Hook, and Lightning Arrester. For short lines.
Cost in 1904 - £2.5.0
NOTE - The above have been designed according to the
requirements and suggestions of the most prominent Railway Engineers in the Kingdom.
Taken from the G.E.C. Illustrated Telephone Catalogue 9th edition (1904)
Last revised: January 23, 2011