This watch is one in a long line of rugged and precise Luminox timepieces. The Atacama features a chronograph face for stopwatch functionality. The famous illuminating microgas tubes last for a quarter-century. Sapphire glass with an anti-reflective coating is extremely scratch-resistant. A PVD-plated stainless steel case withstands the most rugged environments on the planet. Quartz movement for accurate timekeeping. Adjustable genuine-leather strap offers a custom fit. Water-resistant to 100 meters. Case diameter: 47mm.