The Model 1795 muskets were the first muskets produced at the Springfield Armory and also the Harpers Ferry Armory. The Harpers Ferry Armory did not begin producing the muskets until 1798 at the earliest and more probably started around 1800. There were some distinct differences in the muskets produced at the two armories. The models from the Springfield Armory have dates of manufacture on the lockplate and have an eagle stamp with the word "Springfield". Between 1795 and 1816, the Springfield Armory produced about 85,000 muskets. Between the two armories, some 700,000 muskets were produced between 1795 and 1844. This makes it the longest production run in American history. The Springfield musket was used in the War of 1812, the Mexican-American War, and even the American Civil War. They were also carried on the Lewis and Clark Expedition.