Case Material Stainless steel Glass Material Hardlex. Case Size Thickness: 9.2 Diameter: 39.4. Movement Caliber Number V157 Movement Type Solar Duration Operating for approx. 10 months (when fully charged) Accuracy ±15 seconds per month Other Details Clasp Three-fold clasp with push button release Water Resistance 5 bar Features Date display Overcharge prevention function Quick-start fu