This original U.S. Army Model 1873 socket bayonet was designed for use with the Springfield Trapdoor rifle in .45-70 Government and dates to the Indian Wars era of the 1870s–1890s. It features an 18-inch triangular blade with a crisp "US" marking at the base and a functional locking ring at the socket. The steel blade has aged to a smooth plum-gray patina, and it comes complete with its original blued steel scabbard and a rare period leather frog. The scabbard shows some light surface oxidation but has no dents, while the leather frog remains supple with intact stitching—an uncommon survival due to field use and age. Issued to frontier infantry during campaigns in the American West, this bayonet represents a key piece of U.S. military history. Sourced from the respected Canfield Collection, this is a well-preserved and complete Indian Wars-era bayonet rig with strong appeal to collectors of 19th-century militaria.