> there were seemingly a lot more tolerances built into the designs. Tolerances for good(!) watches are in the range of 0.01mm to 0.001mm for some components.

> there were seemingly a lot more tolerances built into the designs. Tolerances for good(!) watches are in the range of 0.01mm to 0.001mm for some components. With polishing and a lot of testing this can be achieved on manual machines.