Montblanc Men's 'Nicolas Rieussec' Mechanical Hand Wind Stainless Steel and Leather Dress Watch, Color:Black (Model: 102337) Imported Manual winding movement Case diameter: 43 mm Stainless steel watch Scratch resistant sapphire crystal protects watch from scratches, Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion