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High-precision quartz wristwatches with well-designed temperature compensation can get accuracy within single-digit seconds of drift per year, and even that level of accuracy is enough to make them a niche product. Also, you need pretty good battery life in order to ensure the battery doesn't run out before the drift becomes relevant - some of the higher-end quartz movements already struggle with this a little, and chip-scale atomic clocks are much worse and likely to remain that way. Having accuracy of a second in 5,000 years doesn't give you much benefit over quartz because the battery life is measured in days.

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