" In The beginning, these wristwatches ended up one-off or customized creations that often looked a great deal such as the pocket watches from which they developed. But before long, wristwatches took on their own aesthetic, with their own specialized innovations to solve new challenges offered by wrist-borne timekeepers. Hublot’s https://www.watchesworld.com/a-history-of-watch-reference-numbers/