NATIONAL TELEPHONE COMPANY
Pattern No. B23
Comprises · Hand Combination Transmitter, and Receiver, Cord, Automatic Switch-hook, Induction Coil. Lightning Arrester, Magneto Generator and Bell.
This is a small set and is fitted with a 2 magnet generator which will ring satisfactorily through the 100 ohm bell of the instrument and a line resistance of 5,000 ohms.
The Batteries are fitted away from the instrument.
Taken from the 1903 Catalogue.
Last revised: July 03, 2020