Improved shock resistance
The centring of the balance wheel (vouch of the accuracy) and the protection of its pivots (thinner than a hair) against shocks are traditionally assured by a shock absorber. With the Nivachoc system, the angle of the cone has been optimised as well as the exclusive shape of its spring. This optimisation allows the assembly to play its role of shock absorber while ensuring an excellent recentring at rest.
The Nivachoc system is very reliable, it ensures a maximum recentring force of the balance pivot and it guarantees a constant force over time to avoid deformation. In case of shock, the spring remains in place.