I am trying to gain information about a sword I inherited from my grandfather. I posted here before and learned one of his swords was a Nagamitsu blade and this one I have been told was by Echizen no kami Sukehiro possibly. This sword needs to be polished but I know better than to attempt it myself. The sharpness of the blade is amazing. It is missing the handle and all of the associated hardware but the sheath is complete and in pretty good condition. I do not have a good grasp of the proper terminology for these weapons but I can say they are amazing in there craftsmanship. I would like to know if this is a fake signature if possible, and any info on it's age, maker and use. I would also like to know a value as I intend to add it to my insurance. The value will not be used to sell the sword as I was very close to my grandfather and will keep both the Nagamitsu and this sword to pass on to my son one day. Thanks for any help you can give. JohnP.