NATIONAL TELEPHONE COMPANY
AUTOMATIC MAGNETO INTERCOMMUNICATION SET
Pattern No. B645
Comprises - Hand Combination Transmitter and Receiver, Cord, Automatic Cradle-switch, Induction Coil, Three-Magnet Generator, Polarised Bell, Writing Desk and Automatic Replacement Levers.
With these Automatic Sets it is only necessary when rung up to take the Hand Combination off the cradle and speak, but if desired a reply ring can be given before speaking.
It is impossible to make contact with two points by mistake.
If it is so wished, conversation can be carried on with two or more stations at the same time by pulling down the respective levers together.
These instruments are suitable for short or long distances.
5, 10, 15, 20,
25 & 30 line models.
Last revised: July 07, 2020