T478.  Kiri Mon sukashi tsuba.  8 x 8 x .45 cm.  The nakago hitsu-ana is .7 x 2.8 cm.  This tsuba comes with a Hozon paper from the NBTHK, dated 2018 and giving it to Kyo, Edo Jidai.  There are a few small spots of surface corrosion but nothing deep; the fine sukashi is perfectly intact.  $365.