> A well serviced rolex in 2026 with laser cut gears drifts +/- 15sec per day. M... | Hacker News

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		Yodel0914 3 months ago \| parent \| context \| favorite \| on: Are two heads better than one? > A well serviced rolex in 2026 with laser cut gears drifts +/- 15sec per day. Modern Rolex (and Omega et al) are more like +/-2s.

fainpul 3 months ago [–]

You would probably use a chronometer:

"The precision of a COSC-certified chronometer must be between -4 and +6 seconds per day."

https://www.cosc.swiss/cosc-faq

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