I knpw it is in bad taste to discuss a coin that is in an active auction. I also know that what I am seeing has absolutely no chance of being real. Yet, if you look closely under the last "E" in DIME on the reverse of this PCGS 35 1857 I Repeat 1857 Dime. There is a CC, Carson City mintmark and it doesn't look pmd. James
I see an 8 on its side. Or maybe Dumbo. I think this is a case of pareidolia, not a clumsy fake with an impossible mintmark that somehow slipped by both PCGS and Great Collections.