Additional Especially, “if not built during the workshop, every little thing was produced in one hour’s push from Stamford”. The 3rd big stage happened while in the early 1900’s. The shape with the timekeeping equipment modified in favor of the wristwatch. The main chronometer wristwatch movement came in about 1910, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/