Movement diameter: 39.15 mm Thickness: 9.00 mm Number of jewels: 62 Balance: Glucydur®, 4 arms, moment of inertia 4.8 mg•cm2, angle of lift 53° Frequency: 28,800 vph (4 Hz) Balance spring: elinvar by Nivarox® Shock protection: INCABLOC 908.22.211.100 (transparent) Escapement wheel jewels: Rubifix (transparent) Stem with three positions: Manual winding, date adjustment, time setting