The Dials consist of sunray and guilloche finishes, and therefore are generally protected by scratch-resistant sapphire crystals. Connected towards the cases are buttery-easy Barenia leather straps, generally in the color of your respective picking out. Declaring the winner of your race to develop the very first automatic chronograph in 1969 https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/