The Dials incorporate sunray and guilloche finishes, and are usually shielded by scratch-resistant sapphire crystals. Hooked up to the scenarios are buttery-easy Barenia leather-based straps, often in the color of your respective selecting. Chronographs — with their bezels, scales and sub-dials — are frequently considered too complex for official responsibility https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/