[G 10.01.2012]
The wind-up knob has stopped working. It's loose and has no effect when turned.
Note: A company here in Sweden made a simple repair (the ring around the days dial had loosened, and they removed it). They did not touch the wind-up knob. This happened of its own accord shortly after.
Wind-up knob is broken; has no effect when turned. Note that I recently had some repair work done on the metal ring around the day dial. This did not affect the dial knob, as this was not touched.