I just hate driving out of town for 2 hours, but on this occasion, it paid dividends. I finally got an answer to my movement regulation problem & discovered something interesting about the Wyler brand and of the different automatic mechanism they patented. I was happy to see that this 90 + gentleman is still with us and of the conversation we had.
In particular I was blown away with his story of what I mentioned in my previous post of his most challenging experience while learning his art, that his master gave him a hair spring that was twisted and made up like into a ball. His mission to pass was to get it straight, reshape it and get it working again. He had to replace it in the balance wheel and Collette and get it right with the screwed in balance weights. He then had to set it in beat getting it half way between the banking pins and got it accurate to almost chronometer level. That is BRAIN SURGERY of the trade area. It would not pay for anyone to do this today, as it would cost a fortune, but good skill developing.
By the way for those are not teetotallers, I would try a sip of Strega Liqueur especially for the winter months as it is a good pick-me-up. Disclaimer I have no vested interest in this . https://en.wikipedia.org/wiki/Strega_(liqueur)