What the heck? I'll take a shot. I like the koshira but it looks like it was cobbled together. I could be, and often am, wrong but doesn't look like a set. Other than it looks well cut I can't really say anything about the mei. It does look suriage so it's possible it was cut down for WWII. Now to the blade... man! It has suffered that's for sure. Looks like it was used to hack down a shed or something. I doubt if it's worth anything in this condition and polishing would be a huge, expensive risk. Unless the mei is real and from a really good smith the odds of a collector wanting it is small. If you only paid a couple hundred for it *shrug* not really much downside. I look forward to seeing what the mei says. And reserve the right to change my opinion at any time. :D