Thinking about that, i cant imagine quenching an half inch thick blade and expecting much sori. It also makes me start to think about how the hamon is so defined. Its more defined than that of high quality smiths working on typical thickness blades. That would be one hell of a blade to create, you would think the smith would be proud enough to finish off with a neat yasurime and a mei.
Anyways, it is interesting and i will genuinely be glad for those that called it right, should it be right. To me its an oddball
Some of us always err on the side of caution and look at items with suspicion, that's a natural process with antiques, i find.