Tsuba : Iron Tsuba (Nihon Tosogu Museum: Bunka Shiryo Tosogu paper)
Mei (signature) : Mumei(Shoami)
Length : 8.34cm x 8.37cm ( 3.28inches x 3.3inches)
Thickness of rim: 0.4cm ( 0.16inches)
Jidai(era) :Edo Period
Special feature: Round shape iron tsuba with zigzag bridge engraved and inlaid with brass inlay. In Tosogu Musuem it is estimated as Shoami however, from my opinion it could als obe Yoshiro tsuba. The tsuba is finely engraved in radial ray pattern.
The Yatsuhashi design brass inlay is engraved vividly.