" Initially, These wristwatches were one-off or tailor made creations That always appeared a whole lot just like the pocket watches from which they developed. But quickly, wristwatches took on their own aesthetic, with their unique specialized improvements to unravel new complications presented by wrist-borne timekeepers. The red Alpina symbol https://www.watchesworld.com/a-history-of-watch-reference-numbers/