This is an original Civil War M1855 socket bayonet issued to fit the US Percussion Model 1855 Springfield, as well as the M1861 and M1863 rifled-muskets. This was also designed to for use with various U S manufactured 58 caliber muskets. Blade measures 18″, overall length 20-3/4″.The socket has an intact and functional locking ring. Blade surfaces are in good condition with an overall dark brown patina and light scattered pitting. US stamp present on flat of blade. Bayonet is in untouched condition.