Thank you so much, Jim, for the information on this strange beast! Indeed, the blade isn't hexagonal, as I know many of the Solingen imports were. I still have the photo-copies of Brinckerhoff's work, which you sent me many years ago (we're getting old!
) and the styling does appear to be closer to the first quarter of the 19th per that volume. I don't have Adams' book, but I'll have to try and pick up a copy. I still suspect the blade on mine as being a salvage and much earlier, but who knows...