Jacob & Co. EPIC X Chronograph Edition for Men - AAA Master Quality | Copper DLC Grade 5 Steel | Working Chronograph | 24-Hour Stopwatch & Reset | Sapphire Crystal | Silicon Strap Product Details : Description: Open Skeleton Dial With Back Open Automatic Mashinery ,Case diameter44MM ,sapphire glass,Swiss movement, classic crocodile Silicon bands, Stainless steel Copper & Silver case with genuine Silicone Fiber Strap and high quality Original press lock Guaranteed Japanese Fully Automatic Self windibg machinery