Watch Characteristics Model Number W11296-26L Case Material: Steel Diameter: 42 mm Thickness: 10.10 mm Back: Sapphire Movement Type: Self-winding mechanical Power reserve: 42 hours Frequency: 28 800 Alt/h Dial Color: Black Functions Hours, Minutes, Seconds Date Strap Material: Leather Buckle type: Folding buckle (Resource from:http://en.worldtempus.com）