" At First, these wristwatches were being just one-off or custom creations that often looked lots just like the pocket watches from which they progressed. But soon, wristwatches took by themselves aesthetic, with their own personal technological innovations to unravel new troubles introduced by wrist-borne timekeepers. In 1892 they launched https://www.watchesworld.com/a-history-of-watch-reference-numbers/