STERLING TELEPHONE AND ELECTRIC Co. Ltd
STERLING PRIMAX SYSTEM OF AUTOMATIC
By the adoption of our
No. U 426
Automatic Interphone, Wall Pattern (Radial Switch Type), comprising:
Metal parts are Nickel-plated and Woodwork Solid Walnut, with Hinged backboard.
No. U 427
Table Telephone, comprising:
Available in 5, 10, 15 or 20 lines.
Taken from the Sterling Catalogue No. 11 & 12
Last revised: April 28, 2021