The Dials include sunray and guilloche finishes, and they are usually protected by scratch-resistant sapphire crystals. Attached into the cases are buttery-clean Barenia leather straps, typically in the color of your choosing. 1844: Adolphe Nicole introduces the reset feature, making it possible for distinctive situations to become taken in succession. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/