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