The following Magneto-Ringing Telephone Instruments are suitable for use in connection with Switches Nos. 774, 775 and 776.
MAGNETO-RINGING WALL TELEPHONE No. 307
Fitted with fixed transmitter No. 570, generator No. 489, and spoon receiver No. 589 with cord No. 2036, without battery box.
Weight 8.6 lbs.
Price £2 18s.
MAGNETO-RINGING WALL TELEPHONE No. 308
Same as No. 307 but fitted with a hand micro-telephone No. 522, and cord No. 2142.
Weight 8.8 lbs.
Price £3 ls.
Taken from the Ericsson Telephone Catalogue 1903
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