Like All Rolex watches, the Oyster Perpetual Datejust 31 is roofed through the Superlative Chronometer certification redefined by Rolex in 2015. This designation testifies that each watch leaving the brand’s workshops has effectively gone through a number of assessments carried out by Rolex in its own laboratories As outlined by https://www.watchesworld.com/11-of-the-best-womens-watches/