01 733 7730 4157-07 8 24 05PEB MATERIAL Multi-piece stainless steel case, ceramic minutes scale top ring SIZE 43.50 mm, 1.713 inches TOP GLASS Sapphire, domed on both sides, anti-reflective coating inside CASE BACK Stainless steel, screwed, see-through mineral glass OPERATING DEVICES Stainless steel screw-in security crown WATER RESISTANCE 30 bar INTERHORN WIDTH 24 mm