"Proof" is not a grade, it's a method of making a coin. Proof coins are made from different dies to "normal" circulating coins, on a different coin press, and (in many countries) in a completely separate mint facility. Proofs are made to higher standards than circulation coins, and are normally sold straight to collectors who try to take good care of them, so they're normally found in much better condition than circulated coins. But they're still graded on the same scale.
Thus, you can have "perfect" proofs (PR-70), "normal" proofs (PR-69 to 63) and "impaired" proofs (PR-63 and below) - you can even have a well-circulated proof coin grading PR-12 or PR-20.
Thus, you can have "perfect" proofs (PR-70), "normal" proofs (PR-69 to 63) and "impaired" proofs (PR-63 and below) - you can even have a well-circulated proof coin grading PR-12 or PR-20.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis




















