Oris gents prodiver chronograph watch the world of professional divers watches will never be the same again the innovative rotation safety system is the safest there is also equipped with a chronograph super visible counter displays and an automatic helium valve its the ultimate professional divers watch a super sized action hero 51mm in diameter and water resistant to 1000 metresmovement automatic power reserve 48 hours case titaniumcase diameter 51mmstrap titaniumdial black