Vintage Knife Japan Fighting Knife Bayonet With Scabbard Sheath.  Someone used a side grinder or file on the blade. Small bit of leather torn from snap.  Blade is almost 6.5" long, overall length of knife is 11", knife in scabbard is 12.5" long.  Sheath is made for belt loop also.  Push button on side of knife is working.  Japan is stamped on the tang on one side.  Please look at the pictures before you purchase.  Blade has been ground some with a grinding wheel.  Carbon steel blade.