I've been under the weather for a while. Looked at you pics and think (?) the discussion is on the right track. Most likely an end of the war sword that has been left to rust and amaturishly cleaned. I see no evidence of hada (grain) or hamon (temper line). Just deep scratches. The shinogi is severly rounded. The nakago is a bit odd; perhaps that level of rust might (?) occur if the hilt had been really soaked and left to rust. The nakago ana (tang holes) are still quite crisp. IMHO, it's not likely to be worth the time, effort or expense to restore. BUT, that is just one guys opinion based on pics. There are several sword groups in the UK. I would suggest you see if you can get in touch with one of them for a hands on opinion. Sorry I can't be of more help.
Rich S
|