Like All Rolex watches, the Oyster Perpetual Datejust 31 is covered from the Superlative Chronometer certification redefined by Rolex in 2015. This designation testifies that each watch leaving the model’s workshops has efficiently undergone a series of checks executed by Rolex in its possess laboratories according to its possess conditions, https://www.watchesworld.com/11-of-the-best-womens-watches/