Platinum APF Audemars Piguet-AP, CODE11.59 automatic winding chronograph series 1 material 316L stainless steel 2 movement adopts stable movement modified from original Caliber 44013 glass mirror uses anti-glare crystal basket glass 4 strap imported Italian calfskin and canvas Belt 5 watch buckle practical original pin buckle 5 waterproof 10 degrees waterproof can dive to 300 meters 6 size 41mm,