silver mounted file knife

[Berkley]

I just received this knife from a seller who had no idea what it was, as evident from the caption to the seller's picture gallery, which does have a number of views from all angles. The blade, as I hope you can see from my scan, is made from an old file. The scabbard construction, leather over wood, is similar to that used for Nepalese kukris. The knife is very solidly made and functional. I would be interested in hearing any thoughts about its possible origin and age.