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