This model is part of the Seiko Prospex Sea collection, specifically the 1968 Heritage Diver's Watch. It features the Caliber 6R35 movement with automatic and manual winding capabilities. The watch offers a power reserve of approximately 70 hours and includes a stop second hand function and date display. The case is made of stainless steel with a super-hard coating, and it features a sapphire crystal with an anti-reflective coating on the inner surface. The dimensions are a thickness of 12.5mm, a diameter of 42.0mm, and a lug-to-lug distance of 48.8mm. It is water-resistant up to 200 meters (660 feet) and includes a unidirectional rotating bezel and screw-down crown.