NATIONAL TELEPHONE COMPANY
B30

Magneto Wall Sets

Pattern No. B30

Comprises - Granular Carbon Transmitter fitted inside the case, Watch Receiver, Silk Cord, Automatic Switch-hook, Induction Coil,  2 Magnet Generator and Bell.

This small type of instrument will be found useful in positions where the question of space is a consideration.

The batteries are fitted away from the instrument, which can be provided with Lightning Arresters at a small extra charge.

Taken from the 1903 Catalogue.