The electronic circuit has 4 controllable functions (headlights from the "function" button, smoke generator and Telex couplers, for example, from "f1" and "f2", minimal setting for the acceleration and [...] conversion kit can be used for drum-style motors.
With the flat commutator motor there are a number of variations due to different armature diameters and brush plates. The 60904 or 60903 conversion kit can therefore [...] This kit consists of a locomotive decoder, a powerful 5-pole motor, and hardware for converting specific older Märklin H0 locomotives with the smaller size flat commutator motor to digital high-efficiency...