Tie Clip..
Have not found a match for the tie clip.
While there were many makers of that style known and unknown the style dates way back..
The clip itself looks severely worn and it has indents on the alligator clip, this is rare. I haven't found any similar with indents. IMO, that tie clip was quite old in 1971 for the wear to be that severe on the alligator clip. All similar ones I have found by various makers has not had that amount of wear and they are smooth, no indent on the clip.
If Cooper was in his mid 40's he may have had the tie clip for 25 years..
Note the indents,,,