M213.  Iron sukashi tsuba signed Joshu Nishijin Ju Masanori Saku.  7.3 x 7.5 x .35 cm.  The nakago hitsu-ana is .8 x 2.8 cm.  According to the collector I purchased this from, this is the second generation to Ichirobei Masanori, mid to late Edo.  The sukashi is bamboo, there are silver ten zogan dew drops, and gold nunome of clouds.  Condition is just fine.  $175.