Authentic Longines Master Collection model L2.409.4.97.0, featuring an automatic movement powered by Caliber L899 with a 72-hour power reserve. It includes hour, minute, second, and moonphase functions displayed on the silver tone dial (featuring diamond markers) over a blue background. The round stainless steel case measures 34mm in diameter and is 11.1mm thick; it has a deployment push-button fold-over clasp closure system. Secured by a sapphire crystal glass with scratch resistance. Water resistant to 30 meters (approx. 100 feet). Comes with a transparent case back, blue dial color, leather strap material, and includes the Longines warranty information.