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 manufacturer’s workshops has effectively gone through a number of tests done by Rolex in its personal laboratories In accordance with https://www.watchesworld.com/11-of-the-best-womens-watches/