This is a signed Wakizashi with the two character signature of ” Masatsugu “. This is attributed to Ko-Bizen Masatsugu of the Masatsune school. It dates to the Nanbokucho era ( 1336-1392 ) and has a beautiful wavy hamon with much activity and a carving on the left side of the blade . The blade measures 20.7 inches along the cutting edge with an overall length of 29.92 inches and a sori of .55 inches.
Another excellent piece!