1. [Movement] Equipped with 3135 automatic mechanical movement, long movement time 2. [Diameter] 40MM, consistent with the original thickness 12.5MM 3. [Case Buckle] 904L stainless steel case Paired with 904L stainless steel strap/original safety buckle, the inside of the buckle is polished and etched with a steel seal 4. [Mirror] Mirror polished double concave curved sapphire mirror 5. [Light-in-the-dark] Ice blue super bright Luminous, the luminous beaded mirror surface of the ring is double sapphire glass