Authentic Longines Master Collection Automatic watch model L2.257.5.77.7 (also known as L22575777 or L2-257-5-77-7). Features an 18K Yellow Gold and Stainless Steel case with a polished finish, fixed bezel in 18K Yellow Gold, and matching watch band. Silver dial includes Diamond hour markers positioned at the hours and a date function located at the 3 o'clock position. Powered by an automatic self-winding mechanical movement winding crown. Secured scratch-resistant sapphire crystal glass. Case measures: Size (diameter) 29mm, Thickness approx. 9mm. Water resistant to 100 feet / 30 meters. Includes a 2 year WatchMaxx warranty.