NATIONAL TELEPHONE COMPANY
B62

MINING TELEPHONE SETS

Pattern No. B62

POCKET TYPE OF MINING TAPPING TELEPHONE
(For use in connection with Pattern No. B61)

This instrument is fitted with Ringing and Speaking Keys.  The line wires are run bare and the expanding arms of the telephone are intended to hook one to each line, so establishing connection with the engine house.  The Receiver is used both as Receiver and Transmitter and although not so efficient as a Special Transmitter it still gives good results and possesses the advantage of portability.

Taken from the 1903 Catalogue
  

Last revised: November 17, 2025