Luminox is the Official Partner of Bear Grylls CARBONOX™ watch case Swiss Made Origin Swiss Made Always Visible Constant glow for up to 25 years in any light condition Size/Diameter 42mm Water Resistance 200 meters, 20 ATM, 660 feet, individually tested Movement Ronda 515 HF 6 Battery/Battery life 395 / 50 months Case CARBONOX™ with crown protection Bezel CARBONOX™, uni-directional turning bezel Case back 316L stainless steel, screw on Crystal Hardened Mineral Crystal Crown 316L stainless steel Height 14mm Weight 76gr 2 Year Limited Warranty 10 Year Warranty for Tritium Tubes