Thanks to all who replied and for the advice on this piece. The blade appears to be very good in condition, no chips or major scrapes on the surface though seemingly lacking in hada, but better than many I have had a chance to look at within this price range in the US. Still, if all are correct in that there are others out there that are authentic in manufacture and pedigree, I will keep looking. I had considered having it, or one like it, as a part-time 'practical' piece, perhaps additionally having it mounted as katana. Pricewise, it seemed more reasonable than commissioning a new shinsakuto.