NATIONAL TELEPHONE COMPANY
B640

MAGNETO INTERCOMMUNICATION

TABLE SET

Pattern No. B640

Comprises - Hand Combination Transmitter and Receiver, Cord, Automatic Cradle-switch, Induction Coil, Lightning Arrester, Magneto Generator, Bell, Line Selector and Wall Rosette and Cord.

The same general remarks apply as in the case of Patterns Nos. B625 and B630 and further, the Line Selectors of both patterns (Nos. B635 and B640) are fitted with a mechanical click which reduces the risk of making contact with two stations at once.

5, 10, 15, 20, 25 & 30 line models.

Was B92 in the 1903 Catalogue.

Last revised: November 11, 2023