Thank you for the help, guys. I'm a newbie at this stuff yet, and this is my first Nihonto. So I'm trying to keep a lid on my excitement, but I am a little surprised and excited to hear that this blade could/might be saved, and even more excited about the prospect of it actually being (potentially) worth enough to be worthy of the cost of restoration. My thoughts are running in a hundred different directions at once here. I've always wanted a Nihonto, but never had the money, and only grabbed this one at an estate auction because I knew the fittings were probably worth more than I paid, even if the blade couldn't be saved. If I invested several thousand dollars in this one, there's a good chance I'd have to sell it to get my money back, and then I wouldn't have a sword anymore. It's one of those things where I think I could come up with the money for restoration and get by, but would feel a little guilty spending that much on something nice for myself considering family obligations should come first. Know what I mean?
The Chicago show is coming up at the end of April, so that would probably be my best/easiest bet at getting it to a shinsa. I likely won't be able to go, but maybe I could find a collector in the Saint Louis area who'd be willing to take it along for me or something.
I'm still really curious about how old this thing might be. I know the pictures aren't enough for an evaluation, but if you guys have any thoughts, or even leads onto what era or school of swordsmithing I should research, it would be appreciated. I can tell from the nakago it's obviously older than WWII, but don't have enough knowledge to guess whether it's 100 or 500 years old.
Also, I really like the tsuba. It must have taken a lot of work to do all that carving and shaping with chisels, etc. I'd like to research more on it- what schools normally worked in this style, or where do I begin?