Like All Rolex watches, the Oyster Perpetual Datejust 31 is covered with the Superlative Chronometer certification redefined by Rolex in 2015. This designation testifies that every watch leaving the brand’s workshops has efficiently been through a series of checks performed by Rolex in its very own laboratories As outlined by https://www.watchesworld.com/11-of-the-best-womens-watches/