NATIONAL TELEPHONE COMPANY
BATTERY INTERCOMMUNICATION TELEPHONES
Pattern No. B525
Comprises - Hand Combination Transmitter and Receiver, Fixed Cradle-switch, Induction Coil, Buzzer, Push Button, Line Selector and Wall Rosette and Cord.
A special feature with this instrument is, that while all the connections are entirely enclosed, they are easily accessible without removing the instrument from the wall, the terminals being mounted on the backboard upon which the front of the instrument is hinged.
5, 10, 15, 20, 25 & 30 line models.
Last revised: July 07, 2020