BATTERY INTERCOMMUNICATION TELEPHONES
Pattern No. B585
Comprises same parts as Pattern No. B580 with the addition of a Fixed Cradle for the Hand Combination, and a Wall Rosette and Cord.
An advantage in connection with these Sets is that a common battery of three or four cells provides the current required for both ringing and speaking.
The terminals are so arranged that the connections may be made on either back or front.
5 & 10 line models.