NATIONAL TELEPHONE COMPANY
B42

Battery Wall Sets

Pattern No. B42

Comprises - Granular Carbon Transmitter, Watch Receiver, Cord, and Push Button.

This is a cheap wall set for positions in connection with which an instrument without  Bell, or Induction Coil, is suitable.

The same instrument can be fitted with an Induction Coil at extra cost.

Taken from the 1903 Catalogue.