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by MegaDeKay
1735 days ago
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I got an F-91W in April for those times when I am banging around and don't want to risk messing up my beloved Casio 6510BC. I set the time on the F-91W when I got it and it has only drifted off 21 seconds in that time. That is impressively accurate for a $20 CAD watch. |
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Quartz watches are really magic in terms of keeping time. We take it for granted, but it's insane how accurate they are.
Watch accuracy was a big deal before quartz-based watches, because it was really hard to construct watches that kept time with the accuracy required for celestial navigation etc. Sufficiently accurate watches are a whole separate category, called chronometer. There are certification institutes that put watches through internationally standardised thorough testing to check whether the watch truly conforms to the chronometer label.
Even the cheapest quartz watch will pass the chronometer tests with ample margins. It's not even a fair fight.