Coins are graded on a 70 point scale with the lowest numbers being the worst condition and the higher number being the better coins. Circulated grades are from 1 to 59 and from 60 to 70 are uncirculated grades. A grade of MS-67 is a very high grade and a coin with that grade would be uncirculated and would have very few imperfections. An MS-67 is a desirable grade.
Proof
"PL" in coin grading means "prooflike". It is used to describe a coin that has mirror fields and fine details resembling a proof struck coin but is not a true proof.
It depends on what type of coin, year struck, how many have been certified and who graded it. Just because a coin has been graded as a perfect Proof or Mint State example does not mean one type is more valuable than the other.
MS stands for "mint state," which is a coin grading termand the number 66 is on a scale of 1 to 70. The grade MS-66 means the coin is in nearly flawless condition.
In numismatic terms. MS-63 is a grade (MS-60 to MS-70), meaning Mint State-63 or Choice Uncirculated. A coin that is certified as MS-63 has graded by a professional coin grading company.
Proof
Mint status
"PL" in coin grading means "prooflike". It is used to describe a coin that has mirror fields and fine details resembling a proof struck coin but is not a true proof.
Lots of wear on the coin and the lowest grading possible.
Original Government Packaging
MS67 is a really, really nice coin. 70 is the highest you can get and there really aren't many. The coins in your pocket are probably 5 or 10 out of 70. Maybe 20 if one is really nice.
it means that a porfecinal has authenticated and determaned the codition of a coin
Less than good. The lowest grade.
PR is a grading system used for proof coins
Professional Coin Grading Service was created in 1986.
For an informal grading, bring it to a coin dealer for an on-site appraisal. For an official grading, it needs to be sent into a professional grading service.
A slabbed coin is a coin that was graded by a grading service. There are many grading services out there. You can use google to find some of them. Having a coin graded can give you the exact value and therefore is easier to determine its value.