Patek Philippe 324-S-QR

The 324-S-QR is a self-winding automatic movement manufactured by Patek Philippe. It features an annual calendar complication with day, month, and leap year displayed in apertures, paired with a retrograde date hand. A moon phase indicator sits at 6 o'clock, while a central seconds hand provides timekeeping. The movement powers several Patek Philippe references in the Complications and Grand Complications collections.