I just finished looking at some upcoming auction coins. As is typical, many of the coins are the grading mistakes, or the “lucky” upgrades of the big submitters, that the dealers have a hard time selling to any collector with a loupe and at least one good eye.

Grading mistakes happen, mechanical errors (input mistakes, typos, etc.) happen, but isn’t CAC supposed to protect collectors from these screw ups?

The Proof Indian Cent shown above is graded RB and CAC certified. RB, really? Really? RB stands for red and brown. On [...]