Thought I would share a few photos of a very interesting pocket watch I have just serviced, a model 1860 Waltham with vibrating hairspring stud, I also made a “You Tube” video of it so you can see it working.

You tube clip

Also more photos on my website "more photos"

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Wizards and geniuses they were ,the early developers of watch improvements nicely shown Chris !!!

Thank you Chris. That was a fine presentation of a feature I never quite understood.

Amazing piece of work there, Chris!

HIGH regard! Mark

The incredibly intuitive "Breguet Bend" that leads to a fixed hairspring stud and did the same thing in such a simple manner shows where so many different answers were being developed in parallel to solve the issues of accurate timekeeping. Let the best way win!

Simply fascinating!

John