This men\'s Ball Engineer Hydrocarbon Spacemaster Black DLC Chronometer watch is made from solid stainless steel with a Diamond-Like Carbon (DLC) finish, with an anti reflective coated sapphire crystal, both qualities making it intensely resistant to scratches, and is powered by a COSC certified Swiss automatic movement. It is fastened with a black rubber strap and has a black dial with GTTL gas tube lighting, for exceptional low light visibility. The watch has a date function.