Hello Japanese sword experts. I would like your assistance on a Katana to verify it is authentic and a 'real' gunto. Although it won't be sold, an estimate of it's value would be nice. An age of the sword would be nice also. I have tried to attach pics of the sword for your review, but get the msg. "there was a problem uploading your file(s)" May be some limitation on size/no. of pics i can load.  Upload failed even with one .jpg attempted. Any suggestions? Once i can up