This Audemars Piguet Royal Oak Off-shore Chronograph is a special F1 Driver's Limited edition of just 1000 numbered pieces made. It was produced with the F1 driver Juan Pablo Montoya who was a driver for team Williams and subsequently McLaren when this watch was made. Known as JPM for short, this was the first Off-shore chronograph to feature a glass back for us to view it's movement while the hands show the Columbian National flag colours and features many first with entirely different push buttons for the chronograph & bolts+nuts that would influence latter models. The locking crown was inspired by the centerlock nut from the wheels of F1 racing cars while the perforated rotor on the movement is to mimic the clutch plate from the transmission of cars. In short, the watch was heavily influenced by racing car elements and hence it's success