A Wakizashi for comment.

[trenchwarfare]

I have a Vietnam era Dha, with a twist wire grip. If you post on a Japanese sword website, some of the "experts" can determine age, and possibly smith, by blade configuration alone. Then, it can be determined if further investigation is warranted. It's cool as is, and wearing it's last uniform. However, if it's a good blade, papered, and polished, it could be worth thousands.