SEIKO-Prospex Sea SPB545

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 Crystal Curved sapphire crystal Crystal Coating Anti-reflective coating on inner surface LumiBrite LumiBrite on hands, index(es) and bezel Clasp Three-fold clasp with secure lock & push button release, solid & slide adjuster Distance between lugs 20 Other Details Water Resistance 300m / 1000ft diver's Magnetic Resistance 4,800 A/m Features LIMITED EDITION on the case back Serial number engraved on the case back Unidirectional rotating bezel Screw-down crown Screw case back