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| SPECIAL TELEPHONE INSTRUMENTS WALL TELEPHONE AND SOUNDER COMBINED, FOR USE ON TELEGRAPH LINES No. 855
The buzzer is used for calling. Weight 5 lbs. Price £3 15s. See also AB5100. |
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Last revised: May 20, 2022FM2 |
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| SPECIAL TELEPHONE INSTRUMENTS WALL TELEPHONE AND SOUNDER COMBINED, FOR USE ON TELEGRAPH LINES No. 855
The buzzer is used for calling. Weight 5 lbs. Price £3 15s. See also AB5100. |
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Last revised: May 20, 2022FM2 |
This instrument consists of a line condenser, a buzzer with condenser, a
hand microtelephone No. 522 with cord No. 2142, terminals for ringing and microphone
batteries, line, and earth, and is intended for use where both telephonic and telegraphic
communication are required over the same wires.