MATERIAL :Multi-piece stainless steel case & bronze SIZE :40.00 mm TOP GLASS :Sapphire, domed on both sides, anti-reflective coating inside CASE BACK :Stainless steel, special engravings, screwed OPERATING DEVICES :Stainless steel screw-in security crown WATER RESISTANCE :10 bar INTERHORN WIDTH :20 mm MATERIAL : Black leather strap, stainless steel buckle WARRANTY :2 Years