Tourbillion - Bronze Automatic Skeleton Square WatchRIGOUT Tourbillion watch comes with is automatic self winding mechanical movement, it is powered by the motion of the wearer's wrist. Its vintage case is bronze ion plated with skeleton engraved inner dial. Case: Bronze ion plated Movement: Automatic Dial: Skeleton Case Back: Transparent Case Strap: PU Leather Strap Style: Retro Style Crown: Bronze Band Width: 22mm Dial Diameter: 47mm Case Thickness: 14mm