Seiko Prospex Sea 1965 Heritage Diver's WatchRoyal Jewelers is an authorized Seiko dealer in the Boston area and offers the Seiko Prospex Sea 1965 Heritage Diver's Watch with Seiko's 3 year warranty. Movement Caliber Number 6R55 Movement Type Automatic with manual winding Precision +25 to 15 seconds per day Power reserve Approx. 72 hours(3 days) Jewels 24 Functions Stop second hand function Case Band Case Material Stainless steel Case Size Thickness: 13. 0mm Diameter: 40. 0mm Lug to lug: 46. 4mm