"ANTI INDUCTION" DOUBLE LINE INTERPHONES
WITH AUTOMATIC REPLACEMENT LINE SELECTORS
Enabling any number of separate conversations to be carried on simultaneously, free from cross talk due to induction.
No. U 445
Patent "Anti Induction" Double Line Automatic Interphone. Wall Pattern, Comprising: Standard pattern Hand Combination (No. U 175), Automatic Switch Cradle, Induction Coil, Call bell, Combined Ringing Key and Self Replacing Line Selector.
Metal Parts are Nickel Plated and Woodwork Solid Walnut.
No. U 447
Table Telephone, comprising: same parts as No. U 445, but with Buzzer instead of bell and with the addition of Multiple Flexible Cord and Wall Rosette.
Available in 10, 16, 20 or 30 lines.
Taken from the Sterling Catalogue No. 11 & 12
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