T377.  Iron sukashi tsuba.  7.5 x 7.7 x .3 cm.  The nakago hitsu-ana is .9 x 2.7 cm.  This tsuba is thin plate with many tekkotsu; it could be early.  There is an obvious forging flaw but I’m certain it has been here a very long time, if not from the beginning.  Great patina but half price with the flaw.  $125.