/fa/ - Fashion

>>16000686
You do know that the “superlative chronometer” standard is a measurement of the average daily deviation of the watch, not its performance against a reference time right?

A Rolex can in theory pass the superlative chronometer standard if it runs +30 seconds per day against an atomic clock so long as it doesn’t deviate from the +30 by more than -2/+2 on average per day. It’s just a slightly more strict COSC-like test of the fully cased up watch.

Accuracy does not equal precision.

Pic related shows that a Rolex watch ran at +10 seconds on the third and fourth days of its COSC test, but it did so consistently across the two days so it was scored a deviation of 0 for that phase of the certification.