Stainless steel case with a stainless steel bracelet. Fixed stainless steel bezel. Black barleycorn pattern dial with silver-tone hands and Roman numeral hour markers. Minute markers around the outer rim. Dial Type: Analog. Luminescent hands and markers. Date display at the 3 o'clock position. Power reserve indicator sub-dial at the 6 o'clock position. Automatic movement. L693 engine. Scratch resistant sapphire crystal. Pull / push crown. Skeleton case back. Case diameter: 42 mm. Case thickness: 15.5 mm. Round case shape. Band length: 8 inches. Deployment with push button clasp. Water resistant at 30 meters / 100 feet. Functions: date, hour, minute, second. Luxury watch style. Watch label: Swiss Made. Item Variations: L2 666 4 51 6, L2-666-4-51-6, L2/666/4/51/6, L26664516. Longines Master Collection Automatic Black Dial Stainless Steel Mens Watch L2.666.4.51.6.