3 ms·
> The 700P was accurate to +/- 1 second per day, way beyond the reach of any mechanical calibre without electronic assistance. That’s true, except for Zenith D
by criddell 3y ago
> The 700P was accurate to +/- 1 second per day, way beyond the reach of any mechanical calibre without electronic assistance.
That’s true, except for Zenith Defy Lab. It is purely mechanical and has a +/- 0.3s per day.
- ooterness 3y agoI'm still waiting for a watch with a chip-scale atomic clock. Typical accuracy on current-generation systems is ~0.1 msec/day. https://en.wikipedia.org/wiki/Chip-scale_atomic_clock https://en.wikipedia.org/wiki/Chip-scale_atomic_clock
- maratc 3y agoIf being exact to the extreme is your thing, you may look into either high-frequency quartz (these are exact to within seconds a year), or any bluetooth-adjusted Casio (these will quietly sync with your phone several times a day, and your phone is synced to an atomic clock).