Breguet Classique 5197 with escape wheel, anchor and silicon balance spring

The spiral has a curve in the center, and not variables section , and an integrated ferrule. The major difficulty posed by its realization lies in the development of the thermal coefficient , ie the ability of the watch to maintain whatever temperature constant running.

These elements, also protected by a patent, mark a decisive step in the quest for isochronism for mechanical watches , with performance results that are usually achieved by Breguet .

Finally , silicon is a non-magnetic material , the watch works without risk of damage by magnetic fields or pulses.

Breguet 5197

The timepiece is no exception so far to expensive to house aesthetic rules and remains faithful to the pure or refined style, the Classic collection. Within a finely carved from yellow or white gold, guilloche dial hand décor grain barley is circular housing shown great originality turn hours , consisting of two half offset circles , is a nod to the shape of the spiral .

The blued steel Breguet hands flying Roman numerals , while the calendar reads in a window at 6 o'clock . The Breguet secret signature , which appears on the dials since 1795 , is here also attached to the anchor and wheel in silicon revealed by the transparent caseback.