Luminox Watch Automatic Sport Timer 0920 Series XS.0921.M. The Luminox Sport Timer incorporates an automatic movement into the sporty vintage design. The 42 mm stainless steel case with a stainless steel and ceramic turning bezel is combined with a quick-release system 316L stainless steel strap. Water-resistant to 200 meters and featuring a sapphire crystal, and a screw-down crown and screwed-in case back, this timepiece is rugged and versatile, perfect for both the ocean and the office.