It Wasn’t until the early 1900s that Males started to ditch their pocket watches for wristwatches. (There’s loads of discussion all over who produced the main Formal wristwatch for men, but for this story, let’s go together with Louis Cartier, who built the Cartier Santos-Dumont in 1904 for his pilot https://www.watchesworld.com/11-of-the-best-womens-watches/