Patek Philippe caliber R AL 27 PS
R AL 27 PS description
Caliber R AL 27 PS. Self-winding. Minute repeater with two classic gongs. 12-hour alarm. Chiming mode indication in aperture. Small seconds. Diameter: 30 mm. Thickness: 8.23 mm. Number of parts: 561. Winding rotor: Rhodium-plated 22K gold off-center minirotor with yellow gold edges, hand-engraved with Mr. Philippe Stern’s signature. Frequency: 21,600 semi-oscillations/hour (3 Hz). Power reserve: min. 43 hours - max. 48 hours.