This knife was called by Sears the Craftsman "Heavy Skinner", and I am pretty sure it is an Imperial, though not one produced under the Imperial tang that I have seen. The tang is partially hidden, and the design was flawed. FOur out of five of these I have seen had a stress crack in the Staglon delrin on the top where the tang entered the handle. To me, these knives have features that shout "Imperial", and some that whisper Schrade Uncle Henry. Blade profile is like a short 165OT, Staglon handles like a 165UH with the fromt shape like a 15OT, and the spine grooves seen on both Schrades and Imperials of the 1960's.
Codger