Steel Grey Longines Master Collection L27934576 Men's Watch with Black Dial and Diamond Indexes The Longines Master Collection is a combination of classic elegance and excellent quality for those who appreciate exceptional watches. This Longines men's steel grey wristwatch features a 40mm wide case with a glossy black dial and rotating seconds scale. The watch has silver hands and 13 Top Wesselton diamonds as indices. It has the date display at three o'clock and a steel strap with both a brushed and a shiny surface. The strap has a three-fold clasp with buttons. The Longines Masten Collection watch has automatic movements with a power reserve of 72 hours and the dial is protected by a scratch-resistant sapphire crystal. The background of the watch is also transparent and protected by sapphire glass. Model number: L27934576 Case material: stainless steelCase color: steel greyCase diameter: 40 mm Watch thickness: 9.8 mmStrap material: stainless steelStrap color: grayStrap width: 21 mm Watch weight: 144.5 g Sapphire glass, scratch-free Dial color: green Diamonds: 13 Top Wesselton VS-SI diamonds (0.059 ct) Date display Water resistance: 30 meters (3 bar) Movement: automaticPower reserve up to 72 hours