Inside the UK's biggest mechanical signal box, Shrewsbury's 180 lever Severn Bridge Junction, in October 1989. Spencer Street no 1 in Melbourne, with 192 levers, is the world's only larger such installation.
Location: Severn Bridge Junction
Original line: Shrewsbury and Birmingham Railway
Photographer: Ian Dinmore
Contact photographer: Ian Dinmore
Date: 26/10/1989
Image number: 32567