4947/1A – COMPLICATIONS SELF-WINDING

Blue, vertical and horizontal satin-finish (“shantung” finish), gold applied numerals. Steel. Diameter: 38 mm. Height: 11 mm. Water-resistant to 30 m. Sapphire crystal case back. Steel. Fold-over clasp. Annual Calendar. Day and month by hands. Date in an aperture. Moon phases. Sweep seconds.
Annual Calendar. Moon phases. Diameter: 30 mm. Thickness: 5.32 mm. Number of parts: 328. Bridges: 10. Jewels: 34. Power reserve: min. 35 hours – max. 45 hours. Winding rotor: 21K gold central rotor. Balance: Gyromax®. Vibrations/hour: 28 800 (4 Hz). Balance spring: Spiromax®. Hallmark: Patek Philippe Seal.