Movement: Swiss Made ETA 1/60 split-second chronograph movement: Auto correct big date function: measures up to 30 minutes elapsed time: Case and dial: Combination brushed and polished stainless steel case with bulbous shape and sphere: shaped mineral crystal: 42mm diameter: globule pushers: genuine Mother of Pearl dials depending on model: Tritnite luminous hands: date display: Band: Genuine copperhead snake: Water resistance: 100 meters Tritnite is a luminous material developed by Invicta in Switzerland. It is a high quality product that allows hands and markers covered with it to glow for an extended period of time. When exposed to regular daylight, it will hold its glow for about 20 hours.