MATERIAL Multi-piece bronze case, stainless steel case back SIZE 41.00 mm TOP GLASS Sapphire, domed on both sides, anti-reflective coating inside CASE BACK Stainless steel, screwed, see-through mineral glass OPERATING DEVICES Bronze screw-in security crown WATER RESISTANCE 10 bar INTERHORN WIDTH 20 mm MATERIAL : Olive textile strap, bronze folding clasp WARRANTY :2 Years