NATIONAL TELEPHONE COMPANY
B365 & B370

Mining and Engine House Telephones

Battery Ringing

Pattern No. B365 & B370

This pattern is of entirely new design, and is constructed to withstand very rough handling.

The Transmitter, Induction Coil, and Switch Springs are mounted on a substantial black fibre slab, the whole being enclosed in a water-tight and gas-tight cast iron case.


The mouthpiece is of gun-metal, and the receiver is fitted in an exceedingly strong gun-metal outer case.

Pattern No. B365 - with extra receiver
Pattern No. B370 - without extra receiver
 

Last revised: July 07, 2020