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The construction of the Speedwell Telephone Exchange at Golders Green, London. 7 February 1938
Trans Atlantic telephony. Interior of the receiving station at Houlton, Maine 1927
Is That Toll Operators at work on the new London Toll Exchange, Norwich Street, Fetter lane 12 September 1921
CPO Wireless van for detecting oscillation. The operator tuning in. 17 January 1927
Power house which enables Mr Brandon Wentworth, a Californian undergraduate, to send wireless messages 19000 miles across the Pacific to Wickford, Essex. 24 November 1926