Calibre 2236 Is equipped that has a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring contains a patented geometry that guarantees the calibre’s regularity in almost any position. Along with his modest workforce, Ellis searched regionally for manufacturers who could make the components to his measurements. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/
Chronometer watches - An Overview
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