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Message:: [QUOTE="John Burgess, post: 4942099, member: 105098"]a completely "perfect" coin is near impossible. However with "proof" strike coins they get close and in a lot of cases can get to perfect as long as they keep the dies fresh, clean, run at higher pressure, ect. ect. If the same minting standards were used for proof coins as they use for business strikes, there would be rarely a proof coin slabbed above PR67. it would still be somewhat cameo but they run the dies to death and set for speed. for business strike, "good" is "good enough". If MS coins were struck with the care proofs were, the question would be "why aren't all business strike coins MS70?". Also why the bullion eagles when graded, a lot get MS69 or MS70, while the struggle is really to get any other cent, nickel, dime, quarter, above MS68.  they are stuck with care, the circulation strikes, Nope. before the public touches either, it's what the mint has done. in a lot of cases with proof struck coins, they are perfect, and in some cases, there's room for improvement, and then there is a rare case where it won't even make a 68 and that's before someones hands get on it. I don't think you'd see a Proof error coin make PR70, I think the error precludes it from being perfect. However this doesn't apply to die varieties.[/QUOTE]