[ Hamilton H60455533Introduction] In 1892, the Hamilton Watch Company was founded in Lancaster, Pennsylvania . In the second decade of the 20th century , Hamilton to become the U.S. Army 's provider and famous. Today , HAMILTON is the world's largest watch producer and distributor - Swatch Group (Swatch Group SA) is one . Hamilton watches are strong American spirit with the unrivaled crystallization of the most advanced technological trends in Switzerland , recognized for its elegant and durable watches to create one among watch manufacturers of the world leader. Hamilton brand is divided into two series : American Classic line expresses the true American spirit of the Hamilton Collection ; khaki series with its long and strong tradition constitutes the Hamilton military watches .