[Wexford]

Patek Philippes new Ref. 5159 takes the officers watch into a new dimension. The diameter of the case, which features a gold dust cover that protects the sapphire-crystal back, is 38 mm  2 mm more than its predecessor. The dial has been thoroughly reworked to reflect the statelier prominence of this wristwatch.
The sapphire-crystal case back reveals the well-known self-winding caliber 315 S QR movement, which automatically recognizes the duration of each month and keeps track of leap years. S stands for sweep seconds, Q for perpetual calendar, and R for the retrograde date with the flyback hand.