The Diver One D1-500 10 year anniversary model features a 316L Stainless Steel brushed & polished case, stunning sunburst blue dial with sand blasted hands and robust rubber strap with stainless steel buckle. The ceramic bezel frames a 4.6mm sapphire crystal with a blue anti reflective coating for viewing clarity. With a fully illuminated bezel and heliox escape valve, the Diver One is a truly special watch for serious diving. All watches designed and improved with 10 years of wearing experience from work mates and contact with customers, watches worn and tested in extreme environments and I’m sure you will be happy with the results. – Paul Scurfield 40mm 500m Water Resistance 20mm Lug Width $350 shipped Prefer Venmo or Zelle NO TRADES Plenty of references.Thanks for looking!