TiC Is a method of really hard ceramic, and it can even be extra scratch-resistant than sapphire having a Mohs hardness score around nine.5. The bezel can be topped with sapphire, supplying as much protection as is possible towards the micro gasoline tubes that form the markers. Chopard's Mille Miglia https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/