Hi Pete,
I am of the school advocating "leave it alone." Appreciate it for what it is, I say. Jim Gilbert has an outstanding page on his site on (not) cleaning tsuba. You may want to check that out...
Steve
Hi Pete,
I would agree with Rich. Early-ish Edo Owari would be my guess. The boldness, the heavy squared mimi, the geese motif, the symmetry all suggest Owari to me, though it has a relatively "new" feel" to it, I think...
Steve