The coil tests within 1 ohm of the SYX Test Label dated 28 February 1958. W.R.SYKES I.S. CO. LTD. CLAPHAM, LONDON.
Polarised Relay Type BE131 250 Ohms Siemens & General Electric Railway Signal Co
Railwayana Bakolite Signalling Box Indicator Repeater Equipment SYX Slot On Off
1970 Sidcup Relay Room Signalling Signal Box Sidings Railway Plan Diagram Map
Westinghouse Signalling Renewal Parts Brochure DC Neutral Relay Style D5 1954
Westinghouse Signalling Renewal Parts Brochure DC Earth Detector Relay A 1950
Syx Signal Box Brass Plunger Brass ring with "Down Main Commutator".