Bosch drill (Clevedon BS21)

This drill is about 25 years old and has been involved in most of the build projects in my house... until it recently stopped working. I have replaced the brushes in the drill and the fuse in the plug and it still does not work. Maybe you will have better luck. The drill comes in its original case with instruction booklet, depth stop and handle. The drill is powered by mains electricity, it has a two speed mechanical gearbox with infinitely variable speed control and has a keyed chuck.