240 SQU
Self-winding
Ultra-thin
Entirely skeletonized, decorated and engraved by hand
Diameter: 27.5 mm. Thickness: 2.53 mm. Number of parts: 159. Number of jewels: 27. Power reserve: min. 48 hours. Winding rotor: 22K gold off-center minirotor. Gyromax®. Frequency: 21,600 semi-oscillations/hour (3 Hz). Balance spring: Spiromax®. Distinctive sign: Patek Philippe Seal.