I have a self-employed friend who makes clocks and clock drives, musical
instruments, computer controlled drives etc. Much of what he does is of
interest to physicists.
I suspect advertising on these lists is verboten, however, P****,
Vernier, etc. are often mentioned. I would like to mention his name,
give his web site (rather interesting) link, and tell all he now mfgs.
very accurate sidereal clocks.