The Precision of a Rolex Superlative Chronometer is on the order of −2/+2 seconds per day – the rate deviation tolerated by the brand to get a concluded watch is appreciably more compact than that acknowledged by COSC for official certification of the movement on your own. The Superlative Chronometer https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/
Brands That manufacture chronometer watches No Further a Mystery
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