INFANTRY Mens Silver Pocket Watch Windup Mechanical Pocket Watches for Men with Chain Double half hunter windup mechanical pocket watch Classic Roman numerals with anti-scratch mineral dial window Tough stainless steel case with 370mm chain 46mm watch case, 16mm case thickness, 2.2 ounces light weight Mechanical watch need to wind up every day before use Movement: Manual Hand-winding Semi-automatic Movement. Case material: Stainless steel Chain material: Stainless Steel Size of case diameter: 46mm Thickness of case: 16mm Chain length: 370mm