I really like Imperials. They go waaaay back. The artwork on your fish-knife is classic: love it. I'm really glad you started this thread Joel! My latest are (I bought these as a lot of Imperial knives):
1. "Faithful Companions II" set from 1979 (I started another thread about these specifically)
2. Double Eagle 4815 "Big Horn". It seems from 1978 or 1979 because box and sheath are right and came in same lot with '79 gift-set. (Frontier brand version sold everywhere Schrade wasn't sold of 4-pin LB-7)
3 .HS-6 type fixed blade hunter. I think 1950s from tang stamp but not sure. (no scaler on back-edge, 5" blade, full tang construction)
4. 4-pc "tool-kit" likely 1960s (small fake MOP knife and three extra blades all in small vinyl pouch. It has one permanent master blade and 3 extra interchangeable blades which snap on other end of knife making it a 2-things-at-a-time-knife)
5. old Imperial pocket-knife. I have no clue what this is all about.
Photos posted are taken by guy I bought these from. I have not received any of these yet but will photograph them better if they are worthy and add specifics to this thread about them when I do. This is the 1st 4-pc tool-kit I've seen (and yes it's complete), all others have been 6-pc.