NATIONAL TELEPHONE COMPANY
B

Telephones for existing Electric Bell Wires

'DOUBLE CALL' WALL SET

Pattern No. B710

With Hand Micro-Telephone (fitted with Ringing and Speaking Keys in the handle), complete with Bell and Automatic Switch.

With this instrument ringing can take place both ways.

It is suitable for use with Patterns Nos. B685, B690, B715, and B720, for distances up to 200 yards.

This is a similar instrument to the above but with all fittings cream colour, and the metal parts, gilt.
 

Last revised: November 17, 2025