Audemars Piguet. A protracted-time most loved of your elite, AP is undoubtedly an icon of watches each old and new. They are unafraid to try new factors, Which explains why they have a lot of unorthodox pieces inside their selection.Helium Escape Valve (HEV): At first co-produced by Rolex and Doxa, this is the smaller, spring-loaded just one-way va