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Amplitudes and Rates
A try to explain my view
If a movement has a technical issue, e.g. too much friction at a specific place, then the amplitudes will decrease quicker than Rolex designed for. If you don't compensate this effect by frequent windings, then the amplitudes enter after some time into a critical region (approx. < 200 degrees) and the rates will become worse, i.e. rates get more and more negative (less accurate). This unwished friction continues with time and significant wear will further degrade parts of the movement, hence your watch gets more and more inaccurate.
Example: SD43, purchased in 2017, after 2nd Rolex repair in 2019 gave the following result:
Dial Down position:
Full winding -> 286 deg., 4 s/d
After 10:00 h -> 282 deg., 3 s/d
After 26:00 h -> 267 deg., 3 s/d
After 36:00 h -> 259 deg., 4 s/d
I consider this 3235 running very well because the amplitude loss is small, the +4 s/d can be regulated or adjusted.
For me, amplitude-loss measurements vs. time is the key observable.
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