The British Rail 750v Third Rail Live Line Tester Egg Box Indicator Light is a hardware railwayana collectable that serves as a practical tool for testing live third rail lines in the railway industry many years ago! The egg box design provides a sturdy and durable housing for the 6 indicator lights, ensuring reliability in a demanding work environment. This unique piece of railwayana is not only functional but also serves as a symbol of British rail history and transportation collectables. Ideal for collectors or professionals in the railway industry, this item offers a blend of practicality and nostalgia.