Looking for feedback on a tanto I recently purchased, with my limited expertise it does appear to be authentic. The tang is signed Norimitsu, with no other markings. I found a lot of swordsmiths listed for this name, is there a way to discern between them by the chisel marks? I ask because the bottom left chisel mark is longer than any of the examples show. 10 3/4 cutting edge, some thinning in the center near a hagire, otherwise sound.
Regards,
Paul