Photo log:
https://imgur.com/a/making-mechanical-watch-VmYL7qF
This part blew my mind:
"All the screws were hand made."
This really is a watch made from scratch.
In the world of industrial machinery it's not too surprising to have to make special fasteners from scratch, especially as replacement parts may no longer be available from the original manufacturer. Taps and dies are common tools, and single-point-threading on a lathe can also be used.
On the other hand, the world of industrial machinery seldom needs M0.6 threads.
Just trying to support it properly so it didn't bend away from your single-point thread cutter would be a challenge. And imagine how easy it would be to drop the part, and how hard it would be to dig it out of the coolant and swarf!
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