GEC K 840
TELEPHONES FOR TRACTION SYSTEMS
Consisting of Hand Combination with Switch in Handle, Induction Coil, Polarised Bell, Lightning Arrester and Condenser, for use in Sub-stations.
Price was £3.10.8.
Taken from the G.E.C. Illustrated Telephone Catalogue 9th edition (1904)
Last revised: January 23, 2011