For Timepiece aficionados and connoisseurs, a COSC-validated timepiece isn’t simply a item of tech but a evidence to Long lasting excellence and precision. It represents a timepiece that: Provides outstanding dependability and precision. There you've it, 5 brands that have played a large job in the event of the chronograph. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/