Nivachoc (aka Nivashock) is an anti-shock device that was developed by Neuchâtel based Nivarox-FAR around 2003-2004. It was first introduced in the Breguet automatic caliber 777Q at Baselworld 2006. Nivarox-FAR and Breguet are both owned by the SWATCH Group conglomerate and since then, Nivashock is found in other SWATCH brands such as Omega, Rado, Longines, etc.
As with other shock absorbers, it is a spring-loaded mounting system for the jewel bearings that support the balance wheel. Anti-shock devices help protect the balance wheel’s pivots from damage in the event of dropping the watch or hitting it against something hard.
In ETA’s own words:
“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.”