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