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.Features:Luminox Light Technology: - The unique Luminox Light Technology (LT) ensures ata-glance visibility in fact, the technology provides a constant glow 24/7, no matter what the conditions are, for up to 25 years. The self-powered illumination system utilizes tiny micro tritium gas tubes to create ultimate visibility in complete darkness.Specifications:Watch Details:- Function: Day date- Weight: 185 gTechnical Information: - Movement: Swiss automatic- Caliber: SELLITA SW 220-1- Bezel: Unidirectional rotatingCase:- Case Material: 316L Stainless steel- Case Size: 42 mm- Caseback: 316L Stainless steel screw in- Height: 13 mm- Water resistance: 200 meters / 660 feet / 20 ATMCrown & Glass: - Screw in, crown protected- Glass Material: Sapphire crystal, anti-reflective coatingStrap:- Strap: 316L Stainless steel- Steel- Lug Width: 22 mm- Buckle: 316L Stainless steel