For Timepiece aficionados and connoisseurs, a COSC-validated timepiece isn’t only a product of tech but a proof to lasting excellence and precision. It represents a timepiece that: Delivers great dependability and precision. Meanwhile, Graham has also ventured outside of their comfort zone with some bigger echelon parts. Their Orrery Tourbillon, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/