The precision of the Rolex Superlative Chronometer is while in the order of −two/+two seconds on a daily basis – the speed deviation tolerated from the brand name to get a completed watch is appreciably lesser than that approved by COSC for official certification on the movement alone. This website https://menspremiumwatchesonline01909.thelateblog.com/38275554/the-2-minute-rule-for-authentic-watches-online