A mechanical shunting disc signal as produced by the LMS and later by BR with white track circuit diamonds. These signals are often placed on main running lines to control reversing movements accross the lines or into sidings. The top disc signals to the leftmost track. Mesh and textures by francelinetony, using bloodnok's signalling script and thanks to him for agreeing to the release of this model. Thanks also to Chrisaw for his help in creating this model.