This watch was custom built using a genuine Seiko automatic movement and non-original/aftermarket case, dial, hands, strap, bracelet, etc. All watch modifications are made of high end and durable parts for superior quality and are sealed with plastic after customization to prevent damage. Movement: Japan NH35A Automatic Movement Hacking and Hand Winding. Case Material: 316L stainless steel.Bezel Insert: Ceramic Bezel Insert. Watch Glass: Flat Sapphire Crystal with Cyclops. Water resistance: 10 ATM/ 100m. Strap Material: Stainless Steel Bracelet with Solid End links, screw links, and micro adjust. Please feel free to message us for any further questions or photos!