An odd tanto/wakizashi

[Pitt1999]

I want to get as much input on this piece as I possibly can, so I've started a thread on the Nihonto Message Board Forum already and I have sent an email to Peter Dekker to see if he can give me any help with this strange piece. Now I ask for the varied knowledge of this forum. The blade doesn't seem to be anything too special, some members of the NMB thought it could have been a naginata naoshi at one time that had been remounted as a dha. I thought about this and disagree because from the dha that I have seen here and for sale online, none of them have mounts that are similar to these. The two strangest features of this tanto/wakizashi are the lack of a blade collar (habaki) and the belt clip on the scabbard. The metal used on the fittings seems to be some kind of silver alloy from these photos (these are the seller's photos). The tang has almost certainly been reshaped from it's original form to fit into these mountings. An unusual piece for my amateur eyes, but hopefully something that some of you can give some comments and opinions on.