Movement Caliber Number 6R35 Movement Type Automatic with manual winding Precision +25 to -15 seconds per day Power reserve Approx. 70 hours Jewels 24 Functions Stop second hand function Date display Case/Band Case Material Stainless steel Case Size Thickness:13.2mm Diameter:39.5mm Lug-to-lug:46.4mm Crystal Sapphire crystal with magnifier 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 Weight 147.0g Features See-through case back Screw case back Rotating compass inner ring Screw-down crown See-through & Screw case back