Seiko's 1965 Heritage Diver's Watch pairs a 40 mm stainless steel case with professional 300 m water resistance and a reliable automatic movement. It’s designed for serious diving performance with clear legibility and a durable bracelet. Key attributes: Black | Stainless steel | Stainless steel | Water resistance: 300 m / 1000 ft | Power reserve: Approx. 72 hours | Sapphire crystal | LumiBrite on hands and indices | Unidirectional rotating bezel | Screw-down crown | Three-fold clasp with secure lock and extender | Date display | Automatic movement with manual winding | Black dial with luminous indices | Curved sapphire crystal | Classic diver silhouette | Stainless steel bracelet | Dimensions & fit: Diameter: 40.00 mm | Thickness: 13.0 mm | Lug-to-lug: 46.4 mm | Lug width: 20 mm | Weight: 168.0 g | Composition & care: Case: Stainless steel | Bracelet: Stainless steel | Crystal: Sapphire | Clasp: Stainless steel | Dial: Black | Wipe clean with a soft cloth. Rinse with fresh water after saltwater exposure. Have pressure tests and servicing performed by an authorized service center.