A beautifully detailed Railway Signal Co. 5-lever fully interlocked demonstration scale model lever frame with working gate wheel and mechanism together with signal box diagram which includes locking chart. The style of frame is representative of the first version of tappet locked lever frame manufactured by the company at its Fazakerley works between 1884 and the early 1900s. The model is thought to have been built early in the 20th century and is clearly engraved with the company's name. It is mounted on a wooden table with a brass base and stands some 20.5in tall. There is a minor fracture to the gate wheel locking mechanism.