Movement dimensions: 29.10 x 31.25 mm Thickness: 6.05 mm Number of jewels: 39 Balance wheel: CuBe, 4 arms, 4 setting weights, moment of inertia 7.5 mg•cm2 , angle of lift 50° Frequency: 28,800 vph (4 Hz) Balance spring: AK3 Shock protection: INCABLOC 908.22.211.100 (transparent) Replica Richard Mille RM 72-01