Black Alloy/Leather
Please note this is not a automatic mechanical watch. When you receive the watch, you need to winding the knob clockwise to start it. It requires an every day winding it to keep it running. If you think the watch error is too large, please wind the knob a few more times, but not more than 25 turns to prevent bearing damage. Watch core: mechanical watch, Dial diameter: 40mm, Thickness: 11mm, Total length: 25cm, Strap width: 18mm, Case material: stainless steel, Strap material: High Grade leather, Package:PE Bag