T198.  Iron sukashi tsuba.  6.7 x 6.8 x .4 cm.  The nakago hitsu-ana is .8 x 2.3 cm.  I don’t know which school this would be given to but Shoami is always a safe bet.  I think it is a very well made tsuba and I know that the condition is excellent.  Perhaps something can be known about its origin through the unusual treatment of the seppa-dai.  $225.