The 79230B Black Bay timepiece from Tudor is the reincarnation of their iconic Submariner design and pays homage in design while employing the new in-house movements. The 79230B comes in a polished and satin-finished steel case that is 41mm in diameter with a screw-down winding crown, a domed sapphire crystal and a solid case back. It comes with a unidirectional steel bezel with a matte blue anodized aluminum disc insert and is the perfect tool for the diver. It has a black dial with grey index hour markers and steel hands. The 79230B is powered by the new in-house movement self-winding MT5602 caliber which is chronometer-certified with a power reserve of 70 hours. The case is paired with a steel Rivet bracelet with a fold-over clasp. It has a water resistance of 200 meters (660 feet).