STERLING "PRIMAX" SYSTEM OF AUTOMATIC INTERPHONES
(RADIAL SWITCH TYPE)
(Regd. Nos. 499,444 and 538,687)
ADVANTAGES
ALL LOCAL BATTERIES ARE ENTIRELY DISPENSED WITH
No. U 410
Automatic Interphone, Wall Pattern (Radial Switch Type) Revolving Granular Carbon Transmitter, Induction Coil, Double Pole Watch Receiver, Call Bell, Automatic Switch Hook, "Perfecta" step-by-step Radial Line Selector, Automatic Cut-in and Cut-out Device, Ringing Key.
Metal parts are Nickel-plated and Woodwork is Solid Walnut.
Available in 5, 10, 15 or 20 lines. (Over 20 line models made to order)
Taken from the Sterling Catalogue No. 11 & 12
| BACK | Home page |
BT/GPO Telephones |
A - Z Index |
Sterling Home |
Quick Find |
All Telephone Systems |