At the KRW 10 million-plus tier, the real difference between models is mechanical โ hi-beat's ticking second hand versus Spring Drive's continuous glide.
The real answer lives in your model's manual โ a checklist for safely starting a new or long-stopped automatic watch.
Accuracy shifts with winding, wear time, position, and temperature, so judge it over several days, not a single reading.
The bar or ATM rating matters less day to day than whether the crown is properly closed and how recently the watch sat near a magnet.
From the rotor's spin to the escapement's beat, twelve parts trace how wrist motion becomes a mechanical watch's steady rhythm.
The numbers on an automatic watch spec sheet aren't a scorecard โ they describe different test conditions, and knowing what each one actually measures is what lets you pick the right watch.