" To Start with, these wristwatches ended up 1-off or personalized creations That usually seemed a great deal such as pocket watches from which they progressed. But before long, wristwatches took by themselves aesthetic, with their own technical innovations to resolve new complications introduced by wrist-borne timekeepers. Weiss Watches was https://www.watchesworld.com/a-history-of-watch-reference-numbers/