TERMINAL-STATION TELEPHONE No. 317
Similar to the No. 316, but fitted with a three-magnet generator No. 486 which will ring satisfactorily through the 300 ohm bell of the instrument and a line resistance of 15,000 ohms.
Weight 9.30 lbs. Price £3 4s.
Taken from the Ericsson Telephone Catalogue 1903
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