I spotted this knife at an antique shop this morning and my first inclination was to just buy it but looking at Ontario's website, the asking price is about what they want for new items of this type right now so it seemed more prudent to figure out exactly what it is. I have had no luck finding an example of this anywhere. The little information I found on dating these puts this in the modern production era but when exactly that starts, I don't know, post-Vietnam is all I could find but that's over 50 years now.

Currently out of production as not offered for sale anywhere. Homemade scabbard with it dated in the 90's so not much help there either.