M158.  Iron and brass tsuba.  7.7 x 7.8 x .5 cm.  The person I bought this from describes the work as “Higo style hotsure zogan.”  Hotsure means to boil, I believe.  Aggressive hammer work on a dense plate in excellent condition.  None of the brass appears to be missing (how would you know?).  Comes with a box.  $175.