GRI, this most definitely started out as a Model 14, however; someone altered the hilt and handle shape...AND put it in a wrong sheath...just my observations...
First, let me say that I did not plan on being attacked on my first posting. Second, I would have no problem if it was modified, it is a neat knife. A combat blade with a dive handle. Last, a physical comparison (side by side) shows it could not have been made from a 14. This said, I will concede that the 14 I have and used for a physical comparison is from the 1990’s.