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 brand name’s workshops has successfully been through a series of assessments performed by Rolex in its very own laboratories Based on https://www.watchesworld.com/11-of-the-best-womens-watches/