Tsuba:
Mei (signature) : mumei(Unsigned)(Saotome)
Length : 8.71　cm x 8.55 cm ( 3.42 inches x 3.36 inches)
Thickness of rim: 0.52 cm ( 0.20 inches)
Jidai(era) : Edo period.
Weight: 146 grams.
Special feature: Iron Tsuba, chrysanthemum design is engraved with open work.
This is very rare design Saotome Tsuba.