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