Modern Crossing Protection. Has lots of information and picture coverage of Models XA, XB, Type K relay, Type W Relay, and Type BX Rectifier.
Vintage 1954 General Railway Signal Co. 12V Relay - Type K Size 2
Vintage General Railway Signal Co. Type K DC Relay Railroad 53000
Polarised Relay Type BE131 250 Ohms Siemens & General Electric Railway Signal Co
Type K DC Shelf Relay 53000-137 General Railway Signal Railroad Signal 50-50
LARGE ANTIQUE 19TH ICONIC BRITISH RAILROAD SIGNAL LEVER BY RAILWAY SIGNAL CO.
General Railway Signal Company Ltd Christmas Card 1936 GRS American Alstom
