Calibre 2236 Is fitted which has a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring provides a patented geometry that assures the calibre’s regularity in almost any position. In the meantime, Graham has also ventured beyond their convenience zone with some larger echelon pieces. Their Orrery https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/
Facts About Chronometer watches Revealed
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