The Rolex GMT master was first introduced in 1955 to meet the needs of international pilots. The GMT is an invaluable tool for those who travel long distances due to its multiple time zone functions. This Rolex has undergone a thorough inspection of water resistance, accuracy, functionality and condition to determine the level of reconditioning required to meet our strict standards. It has also been referenced against technical documents and manufacturer records where available to ensure authenticity and a clean history. This is a Pre owned Rolex submariner 116713LN 2009.