Section of a CB1 manual telephone exchange switchboard with positions for three operators, unknown maker, British, 1925-1960. In use at Enfield Telephone Exchange 22 July 1925 to 5 October 1960 ...
AT an ordinary or manual telephone exchange, as is generally known, the subscribers' lines terminate on “jacks,” and are put through to each other by means of “plugs” and flexible conductors. The ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback