Hello Migueldiaz, Sorry that it has taken me so long to reply to your comments.
The blade could very well have been altered from its original shape as you have pointed out. I just hope that when it arrives that there is some form of evidence (poorer finish to the blade surface in that area) that could show whether it was tampered with or not. My main concern is what time period to assign this knife to. Is it late 1890s to early 1900s or mid 1900s? I have seen this style of grip used on early and late pieces but all of the later ones did not have quality of carving that this one has and most were fitted with aluminum hardware. As far as a good story for this being the shape it is, I really cannot improve on the one that you have already posted. I hope you don't mind if I use it.
Robert