The popularity of watches will be postponed until the beginning of the twentieth century. 1904, Louis Francois Cartier, a French businessman dealing in jewelry, complained to Cartier that it was difficult to take his pocket watch out of his pocket when flying a plane, because Alberto Santos Dumont, a good friend of the pilot, wanted him to help solve this problem, so that he could see the time during the flight. So Cartier came up with a way to tie the pocket watch to his hand with a belt and buckle to solve his friend's problem. And this pocket watch tied to your hand is today's watch.