C249.  Iron sukashi tsuba.  8.4 x 8.5 x .27 cm.  The nakago hitsu-ana is 1 x 2.9 cm.  The collector who consigned this tsuba to my site pegs it to Katchushi (armor maker); who am I to argue.  Great thin plate with subtle tekkotsu on the rim; condition is excellent.  With a box and pillow.  $400.