This First Model Hotchkiss carbine was built using a mix of Winchester and Springfield components and would have been used in early Army field trials. Only 501 are believed to have been manufactured. Many were converted into Second Models in 1881 or otherwise altered and re-issued for additional trials. Table #5 Springfield Research Service list on page 343 of "U.S. Military Bolt Action Rifles" by Bruce Canfield lists this example by serial number as having been shipped from Springfield Armory on June 27th, 1879. It has "J.L.P" inspection initials on various components, the three-line Winchester address and Hotchkiss patent marking on the left of the action followed by the serial number, and the distinctive first model magazine cut-off on the right.