BESSERON Skeleton Mechanical Pocket Watches with Black Luminous Case Automatic Mechanical Self Wind Classic Gift Imported Alloy pocket watch case, mirror-like front & back cover, Acrylic inside window with metal pocket watch chain. Black watch cover, skeleton mechanical movement in craftsmanship ,led to the unique aesthetics of the pocket watch . Roman number analog display, white hands on the complex watch dial, easy to identify the time by glance . 3. Skeleton and transparent dial shows exquisite movement and structure within the watch. Case Diameter: 45mm ; Case Thickness: 15mm ; Front Hollow Diameter: 25mm ; Inside Window Diameter: 37mm ; Chain Length: 370mm ; Watch Net Weight :63g