Prospex Speedtimer HBC003J1

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 (super hard coating) Case Size Thickness:12.0mm Diameter:39.5mm Lug-to-lug:44.5mm Crystal Curved sapphire crystal Crystal Coating Anti-reflective coating on inner surface LumiBrite Lumibrite on hands and index(es) Clasp Three-fold clasp with push button release Distance between lugs 20mm Other Details Water Resistance 20 bar Magnetic Resistance 4,800 A/m Features Inner rotating ring with countdown scale Screw case back