Pocket watches were born in15th century. Early pocket watches only had an hour hand, which was inaccurate and thick, and the decorative value was greater than the practical value. There was only one way to wear it at that time. Later, the French court clothes were improved, men's vests appeared, and pocket watches were put in vest pockets through pocket watch chains. Early pocket watches were very thick and even spherical. In many oil paintings of the Dutch painting school, a big ball is hung on the jewelry chain of both men and women, which is actually an early pocket watch with a neck. Later, with the development of machinery, the pocket watch became thinner and it was convenient to put it in your pocket. In addition to hanging the neck and vest, the third way to hang the pocket watch chain is to hang it on the belt strip of trousers and then put it in your pocket. This is the way Americans dress. It was from the end of 19 to the beginning of the 20th century that the United States began to make pocket watches by machinery, and the case was made of cheaper steel instead of traditional Swiss gold and silver. Therefore, the output of pocket watches has increased and the cost has been greatly reduced. The market fell. Many skilled workers can afford it. A convenient way to wear it at this time.

From hanging neck to vest to trouser pocket, this process is actually due to the development of productivity, the cost of pocket watches is gradually reduced, and the market is gradually sinking.