It Wasn’t right until the early 1900s that Guys began to ditch their pocket watches for wristwatches. (There’s loads of discussion about who made the 1st Formal wristwatch for guys, but for this story, let’s go along with Louis Cartier, who created the Cartier Santos-Dumont in 1904 for his pilot https://www.watchesworld.com/11-of-the-best-womens-watches/