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AUTOMATIC TELEPHONE
This telephone is the same as the No. 75 except that it has a DC ringer . The telephone is entirely self-contained, the calling bell being included
in the body of the instrument. The hand-combination incorporates a
highly efficient transmitter of the inset type, and an equally efficient
receiver.
Taken from the GEC Private Automatic Telephone Exchanges No. 18/2 (undated) |
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Last revised: August 20, 2012FM2 |