Rolex Datejust 31mm Black Index 178274 2011 [Preowned]Overview The Rolex Datejust 31 reference 178274 is a refined and versatile expression of the worlds most enduring luxury watch. As a "White Rolesor" model, it features the sophisticated pairing of high performance Oystersteel and a radiant 18k white gold fluted bezel. Within the Datejust family, the 31mm "mid size" has carved out a permanent niche, offering a harmonious middle ground for those who find the 28mm too delicate and the 36mm too