It Wasn’t right until the early 1900s that Guys began to ditch their pocket watches for wristwatches. (There’s a great deal of discussion all over who manufactured the initial Formal wristwatch for guys, but for this story, let’s go together with Louis Cartier, who developed the Cartier Santos-Dumont in 1904 https://www.watchesworld.com/11-of-the-best-womens-watches/