[Werewolf255]

I've just gotten into this hobby and the pivots on these watches are around the 0.01mm range with the individual teeth coming in around that size too. So might be that 0.1mm brass cutting could do the trick, if you finesse it right. From what I've been reading/watching, lots of classical jewelry education focused on learning how to manufacture extremely precise tools to shape, mill, and manipulate various materials.

I had extremely limited success replicating a gear using a 0.3mm FDM Cartesian 3d printer, but even then I had to manually shave off every single tooth under a loupe.