NATIONAL TELEPHONE COMPANY
B36

Extension Telephone Without Bell

Pattern No. B36

Comprises - Hand Combination Transmitter and Receiver, Cord, Automatic Cradle-switch. Induction Coil, Cord and Terminal Block.

This instrument is intended for use when an extension is wanted in connection with a wall instrument in another room when the bell on the wall instrument can be heard in the other room.

By this arrangement it is not necessary to go to the wall instrument in order to answer a call.

Taken from the 1903 Catalogue.