Hello, Bruce, and thanks for your kind help. Yes, I´m just as puzzled as you are as to this sword. As far goes my limited knowledge on Nihonto in general, I do own a couple of "genuine" wakizashi's. Once also had a Naval WW II that I regretfully sold.Have read and studied both types a lot, but this one sort of stands out, like something "in between". I have asked my US friend if he managed to take photographes of the exact spot you mention, but he didn´t. This sword is being shipped writing, so I will have to wait. Two things can be confirmed - 1) the sword has got a hamon, 2) If you´ve read above provenance it is by the book, first hand. Will return once the sword arrives. Must fetch firstly in Sweden, since Post Denmark doesn´t allow weapons to be shipped in and out of the country Lots of thanks for now, Flemming