" Initially, These wristwatches have been one-off or custom made creations That usually appeared a great deal just like the pocket watches from which they advanced. But quickly, wristwatches took by themselves aesthetic, with their unique complex improvements to unravel new problems introduced by wrist-borne timekeepers. In 1892 they launched https://www.watchesworld.com/a-history-of-watch-reference-numbers/