Hamilton, founded in 1892 in Lancaster, PA, is a significant American watch brand known for its military contracts. They provided "GI" models for the U.S. and other countries, particularly during the Vietnam and Gulf War. In the 1980s, Hamilton responded to the demand for civilian models with the "Khaki" field watch collection. These simple, "no frills" designs and robust ETA movements gained popularity. Hamilton also released co-signed dials with notable outfitters like L.L. Bean, Orvis, and REI, making them special pieces of horological Americana.