Railway Track Circuit Operating Clip , never been used. Thanks for looking!
Railway Track Circuit Operating Clip
CAB TRACK CIRCUIT OPERATING CLIP (BOND)
Hornby R070 OO Gauge Motorised Operating Turntable Railway Track Accessory Boxed
Vintage L M & S Rly Track Circuit Cast iron plate in nice condition
Westinghouse Signalling Parts Leaflet AC Track Circuit Testing Set 1949
BR Regulations for Train Signalling on Double Lines by Track Circuit Block 1964
