Btw: Buck is a brand, not a style, like Case, etc. http://www.buckknives.com/ While there, you will notice ALL of their knives say BUCK U.S.A. on the blades.
So it may not be a buck knife, it could be a knife that was in a Buck case? Usually, a Buck knife will say Buck on the blade, if it does not, it more than likely is not a Buck knife. It has something written on the top middle edge of the blade, but it is not legible, could please tell us what it says? If there is anything else the blade may have inscribed on it, could you please share that as well, it would be very helpful in identification.