NATIONAL TELEPHONE COMPANY
B450

BATTERY INTERCOMMUNICATION TELEPHONES

WALL SET

Pattern No. B450

Comprises - Granular Carbon Transmitter, Watch Receiver, Cord, Automatic Switch-hook, Induction Coil, Bell, Push Button, and Line Selector.

5, 10, 15 & 20 line models.

This was mode B65 in the 1903 Catalogue.

Last revised: November 17, 2025