Stuhrling Original Men's 'Tourbillon' Mechanical Hand Wind Stainless Steel and Black Shark Skin Dress Watch (Model: 407A.333X31) 44mm 23K gold-plated stainless steel round case on a black sharkskin strap Black skeleton dial with tourbillon, open heart at 6 o'clock and luminous hands Mechanical-hand-wind Movement Case Diameter: 44mm Water Resistant To 165 Feet