The Seiko Prospex Heritage Turtle 1968 Re-Interpretation Watch SPB313J1 combines a 41mm round-shaped stainless steel case with a super hard coating and a silver stainless steel bracelet with a fold-over clasp. It has a white analogue dial with Lumibrite luminescent hands, indexes and bezel. The date is visible between positions four and five with a circular window, protected beneath scratch-resistant curved sapphire crystal glass. Power is generated by the automatic and manual winding movement with an approximate power reserve of 70 hours. This model also has a water resistance of up to 200 metres. Prospex is a combination of the words 'Professional' and 'Specifications.' Seiko Prospex timepieces are designed to be practical, reliable and durable; to meet the high standards required in extreme environments for sports lovers and adventure seekers alike. Since launching Japan’s first diver’s watch in 1965, Seiko’s innovative watchmaking has changed global dive watch standards.