А что там непонятного, маркетинг такой, слегка преувеличили.
IS IT AN OFFICIALLY CERTIFIED CHRONOMETER?
Although Tudor does not write “Chronometer” across the dial of the Royal, their official marketing says this about the movement inside:
“Swiss self-winding mechanical calibre T603 with chronometer performance”
So does “chronometer performance” means is it an officially certified chronometer or not? This sounds like they are claiming a chronometer-like timekeeping experience, without an actual chronometer certification to go along with it. If this is the case, it could be that they are using a Premium (Top) grade Sellita which runs close to COSC spec but without the official certification.
Sellita’s Premium grade is tested in 5 positions and tests out at an average of +/- 4 seconds per day with a maximum divergence of 15 seconds/day. For COSC, the movement must keep time within an average rate of -4/+6 seconds per day over the span of testing (at least 15 days).
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