This is a sword that’s on display at the Springfield museums. The hamon (its temper line) is very artistic, so I asked some experts about it. While this sword is not battle-worth, since the hamon is a bit too deep (hard metal is more brittle).
The name of the hamon is likely sudareba, but without papers, it would be tough to narrow down a smith.
I don’t know too much about this particular sword, but I do know that aesthetic hamon like this were not made until about the Edo period. They would have been fairly useless in battle. It’s possible that it could have been used as a display/ceremonial sword, but it seems like it’s newer.