Over 30,000 5? Reviews. Rolex GMT Master II 16713. 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. Steel & Yellow Gold. Leather Crocodile Grain – Black. 100 m (10 ATM). 787 562 376 Registered Office Address: 15 HILL STREET, LONDON, W1J 5QT.