Founded in 1892 in Lancaster, Pennsylvania, Hamilton is a member of the Swatch Group. In the 20s of the 20th century, Hamilton became a supplier of military watches to the U.S. military, focusing on the production of special watches for the U.S. military during World War II, providing a total of 1 million watches to the U.S. military, and about 10,000 Hamilton marine chronographs also experienced World War II, one of which was dedicated to President Roosevelt, but it has no military orders today. Hamilton also has a strong relationship with Hollywood, with footage of Hamilton watches appearing in more than 300 films to date, including classics such as A Beautiful Mind. Hamilton has two major product series - American classic and khaki sports, the khaki series is the first choice for entry-level sports watches, the khaki field price of the quartz movement is 2500 yuan, and the starting price of the khaki with the Swiss ETA movement is more than 4000 yuan, and the hot-selling styles are generally between 5000-6000 yuan, and there are also slightly high-end khaki aviation and khaki navy models, such as the khaki Navy Pioneer series small seconds model launched during the Basel Watch Show in 2015. The bezel with Paris studs on the side, linear lugs, concave dial, silver dial and gold hands, and a 43mm case look like Ulysse in Athens, priced at more than 10,000 yuan.