The design of the 3600 series shakes things up a bit with the vertical arrangement of Luminox Light Technology (LLT). This results in a different look, opening up the dial while still ensuring up to 25 years of optimal night visibility. A CARBONOX case and uni-directional rotating bezel encase a black dial with white indices and yellow details. The bezel features dive indicator markers in yellow. Features: Swiss Made Weight: 73 grams Swiss quartz movement Caliber Icon: RONDA 515 Constant glow for up to 25 year Unidirectional rotating Case Material Icon: CARBONOX Case Size Icon: 45 millimeter Caseback Icon: 316L Stainless steel screw-in see through Height Icon: 14 millimeter 200 meters / 660 feet / 20 ATM Screw-in, crown protected Glass Material: Sapphire crystal, anti-reflective coating Genuine rubber strap Black CARBONOX Sustainability: comprehensively CO2 neutral watch and brand, scopes 1,2,3 of the Greenhouse Gas Protocol