I've purchased several
IHC that had 3 to 3 1/2 diamond that were grade as EF 40 to 45
I don't know enough about copper coins to say problem free or not but I didn't notice anything other than a light scratch that I doubt would doom it to as details grade ...
Another thing I'd like to mention is
TPG tend to be a bit generous with these key date coins , so I'd bet you'd get a EF 40 grade on this coin :)