4 LEDs, control: green / green, yellow / yellow or green / yellow.
The Busch models are scale replicas of the originals. A new plastic injection molding technique has made it possible to make the parts as fine and delicate as was previously only possible with the brass etching technique. Light-emitting diodes ensure unlimited service life, prototypical lighting effects and low power consumption. The signals can either be glued or drilled into the system base plate using an exchangeable plug-in foot.