"An Informative guidebook to the heritage of British watchmaking. Horology enthusiasts of all concentrations are guaranteed to uncover price here." The third significant move happened inside the early 1900’s. The form with the timekeeping equipment altered in favor with the wristwatch. The initial chronometer wristwatch motion arrived in about 1910, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/