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 model’s workshops has productively been through a number of checks carried out by Rolex in its have laboratories As outlined by https://www.watchesworld.com/11-of-the-best-womens-watches/