2007 April 21.
The setting-wheel:

(22) The wheel is to replace, to renew.

The present wheel is not the original. How one recognizes by the photos, the toothing is special. Such a shape was standard in Glashütte. This toothing ensures a smooth mesh to the castle wheel. The Clip demontrates the function. The small wheel is to harden and to temper to a yellow color,
after that it gets its finishing.