The Breguet La Tradition grand complication with 50 hour fusee power reserve, one minute tourbillon with titanium bridge and silicon overcoil hairspring is a recent masterpiece created by the Breguet workshops. Each separate complication requires remarkable skill and patience to manufacture.
The fusee chain is a traditional technique that has been used in pocket watches since the 19th century. The conical shape fusee barrel is wrapped with a miniature chain when the watch is wound; the conical shape then creates a constant and smooth power output from the barrel when the energy is released. By making the movement capable of running for 50 hours and regulating the torque, Breguet’s master watchmakers have managed to successfully modernize this traditional skill.
The famous Breguet overcoil hairspring has also been updated by creating it in Silicon. As Silicon is devoid of the malleability of metal, it required a complete rethinking of the production process to form a bend rising up from the coil and created a technical challenge which was brilliantly mastered by Breguet technicians eventually.
To incorporate modern technique and materials into a traditional design the tourbillon upper carriage has been created in titanium and the sapphire crystal heavily domed to offer 21st century protection against damage while offering a 19th century aesthetic.
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