CALIBRE RM21-01 Manual winding tourbillon movement with hours, minutes, function selector, power-reserve and torque indicators. Movement dimensions: 30.20 x 29.20 mm Thickness: 7.14 mm Tourbillon diameter: 12.30 mm Balance wheel diameter: 10.00 mm Number of jewels: 27 Balance: Glucydur®, 2 arms, 4 setting screws, moment of inertia 10 mg•cm2, angle of lift 53° Frequency: 21,600 vph (3 Hz) Balance spring: elinvar by Nivarox® Shock protection: KIF Elastor KE 160 B28 Barrel shaft: nickel-free Chronifer® (DIN x 46 Cr 13 + S) with the following characteristics: stainless – antimagnetic – suitable for tempering