The Dials include things like sunray and guilloche finishes, and so are often guarded by scratch-resistant sapphire crystals. Hooked up into the cases are buttery-clean Barenia leather-based straps, generally in the colour of your picking. Chronographs — with their bezels, scales and sub-dials — are sometimes regarded as as well https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/