SWITCHBOARDS
No. U 585 - Battery Call Systems
No. U 590 - Magneto Systems
Wall Switchboard, comprising Line Indicators, Line Jacks, “Ring of” Indicators, Through Connection Plugs and Cords, Operator’s Combined Listening and Ringing Keys, Night Bell and Switch, also Operator’s Hand Combination.
The Wood work throughout is Solid Polished Walnut.
Supplied in 15, 20, 25 or 30 lines.
Taken from the Sterling Catalogue No. 11 & 12
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