C284. Yamakichibei tsuba. 7.7 x 8 x .42 cm (this is thickest at the rim and tapers down towards the seppa dai). The nakago hitsu-ana is .8 x 2.6 cm. The consignor of this piece knows so much more about it than I do; here is what he has to say about it:

“signed yama (kichi bei) – maybe low crossbar. Momyama/Early Edo.