Seiko prospex automatic men's watch SPB151J1. Case material stainless steel (super hard coating) with a stainless steel bracelet. Case thickness: 13.2 mm, case diameter: 42.7 mm, case length: 46.6 mm. Automatic movement with manual winding capacity. Three-fold clasp with secure lock , push button release with extender. Water resistance upto 200m / 660ft diver's. Curved sapphire crystal, anti-reflective coating on inner surface. Lumibrite on hands, indexes and bezel. Other specifications screw case back, screw-down crown. Three-fold clasp with secure lock. Unidirectional rotating bezel. Other features 24 jewels, date display. Stop second hand function.