1970 Penny (proof) Error or Counterfeit Double Reverse

[VickySilver]

I bought this coin some years ago at, I believe, DNW (Noonan’s) or perhaps Baldwin’s. 
It looked like the real thing but PCGS called it counterfeit. I have a currency 1964 double reverse error confirmed but thought this bit unusual in that it was a proof only year.

i looked for seams or signs of them around the edge and then, where it is sometimes seen, just inside the rim on both sides looking for a seam or the residuals of such but could find none. 
 

It weighed on balance scale (ok, old fashioned) 9.19 gms so just a bit light compared to the standard 9.4 gms. 
 

So below are some pictures and I know the usual caveats but curious if any are oreoared to advance any opinions - I might not, LOL. 
 

I might need some help if anybody wants to email me as I can’t figure out how to compress on thi newer iPhone. 

[VickySilver]

[VickySilver]