The Top-Secret World Of Bovet Hairsprings (Video)

Hairsprings are the most sensitive part of a watch movement, the so-called heart Only a handful of producers are able to make hairsprings, most of which are large-scale industry suppliers A few watch brands manufacture their own using recipes and processes they keep close to their hearts.

Hairsprings are used in the regulator and are to wristwatches what pendulums are to long clocks This is a very critical component as it dictates the precision and reliability of the movement Producers of hairsprings are naturally very secretive about the process and the alloy.

Bovet produces two types of hairsprings: the classic flat variety and the cylindrical kind used for example in the Braveheart Tourbillon. . Source