This is a rare and fascinating Negative 35mm SR EMU 4-SUB 4106 Under Clapham Signal Box. The box is a crucial component of the British Rail signalling system, and this photograph captures it in great detail. The image is from the British Rail (1948-1997) era, and is a must-have for any transportation collectables enthusiast. The photograph is in excellent shape and is a great addition to any collection. It is a United Kingdom product and was manufactured with great precision. This item is perfect for those interested in British Rail history and railwayana collectables.