Every Tourneau Certified Authentic Pre-Owned watch is guaranteed to function within its original factory specifications. Each watch goes through a careful restoration process conducted by one of our master watchmakers. Our restoration process begins with a full movement service and overhaul if necessary to inspect each and every piece of the movement. Next, each piece is cleaned, lubricated and put back together. Any worn or broken parts are replaced using only original manufacture parts to maintain authenticity. The restoration process includes expert cleaning and polishing, testing of water pressure and magnetization and the replacement of straps.