Rack of equipment from Empress (West Kensington) PCM tandem exchange, made by the Post Office Research Centre, Dollis Hill, London, England, 1968. In public service 11 September 1968 to 21 May 1975
ROUTINER I circuit board from Empress Exchange, 1968
Circuit board ROUTINER I, shelf 5, pos 4, from the Empress Exchange (West Kensington) PCM tandem exchange, made by the Post Office Research Centre, Dollis Hill, London, England, 1968
ROUTINER II circuit board from Empress Exchange, 1968
Circuit board ROUTINER II, shelf 7, pos 6., from the Empress Exchange (West Kensington) PCM tandem exchange, made by the Post Office Research Centre, Dollis Hill, London, England, 1968
STORES 007 circuit board from Empress Exchange, 1968
Circuit board STORES 007, shelf 3, pos 6., from the Empress Exchange (West Kensington) PCM tandem exchange, made by the Post Office Research Centre, Dollis Hill, London, England, 1968
S.BUF 035 circuit board from Empress Exchange, 1968
Circuit board S.BUF 035, shelf 9, pos 6., from the Empress Exchange (West Kensington) PCM tandem exchange, made by the Post Office Research Centre, Dollis Hill, London, England, 1968
Circuit boards, combined, REG B 003 and 3B, shelf 9, pos 4., from the Empress Exchange (West Kensington) PCM tandem exchange, made by the Post Office Research Centre, Dollis Hill, London, England, 1968
Circuit board, shelf 8, pos 3. from the Empress Exchange (West Kensington) PCM tandem exchange, made by the Post Office Research Centre, Dollis Hill, London, England, 1968
Miscellaneous parts from exchange and circuit boards, including detached labels, screws and knobs. From Empress PCM Tandem Exchange, Post Office Research Centre, Dollis Hill, 1968