welcome to the German DGC message board!
Sorry for my late response, I was on vacation - no cell phone,
no PC, no TV....
and no clocks... 
Just to sum up the history a bit, I would like to remind especially the
U.S. readers that knowledge and records of German clock making is
surely uncomplete.
Many records have been destroyed, lost, or were simply thrown away
during the decades.
It seems, noboby ever thought about the future, regarding us clockies
and I guess nobody even cared.
So in fact, a vast number of pieces of the puzzle might never again be
relocated and this makes serious research very difficult and often
coincedental, if not at all impossible.
When it comes down to any old government regulations, well, that's a
similiar situation and all you have to do is find the "right guy" who "knows".
But, as you might imagine, that kind of "hobby legal historian" doesn't
hang around in the local bar...
The German clockies have learned to live pretty well with the problems
and "mysteries", what other choice would there be?
Jurgen