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