AboutMyCoin2010-S Silver Proof Washington Quarter in PR66
A 2010-S silver proof Washington quarter graded PR66 is that coin in one particular state of preservation — the date and the mint mark are already fixed, and PR66 is what a grader called the surface that survived. What that looks like on this coin is below. Where the grade sits against the rungs either side of it, and every way it is written on a slab, are in the table below.
What PR66 means
A 2010-S silver proof Washington quarter in Proof (PR-66) is better than the run of surviving proofs of its date: the mirrors are unbroken, the open fields of Washington’s cheek and jaw are clean under magnification, and the contrast between field and device is what the grade is really paying for.
A slab, a dealer’s list or a price guide may write this grade PR-66, PF66 or PF-66. They are the same grade and the same 2010-S silver proof Washington quarter.
Where this grade sits
The grades a 2010-S silver proof Washington quarter is given run from PR60 to PR70. One step up from PR66 is Proof (PR-67). In general terms, the higher the grade the more the coin is worth.
| Grade |
|---|
| Proof (PR-60) |
| Proof (PR-61) |
| Proof (PR-62) |
| Proof (PR-63) |
| Proof (PR-64) |
| Proof (PR-65) |
| Proof (PR-66) ← this page |
| Proof (PR-67) |
| Proof (PR-68) |
| Proof (PR-69) |
| Proof (PR-70) |
How to check this yourself
Sold listings, not asking prices. The link below is already filtered to completed sales of a 2010-S silver proof Washington quarter in PR66, which is the difference between what somebody paid and what somebody hoped for. Until this site has a researched figure for this grade, that search is the answer — take the middle of several recent sales rather than the highest.
Completed sales of a 2010-S Silver Proof Washington Quarter in PR66 →
The metal floor under it
$11.64
0.1808 troy oz silver × $64.38 per troy ounce
$64.38/ozt, based on spot prices at 23 September 2026 19:59 UTC
Whatever the market does, a 2010-S silver proof Washington quarter cannot be worth less than the metal in it. That figure is what the premium for PR66 is measured against, and it moves with the metal price rather than with the coin market.
Not an appraisal. AboutMyCoin estimates from published specifications and does not authenticate or grade coins.
2010-S Silver Proof Washington Quarter: every grade, the metal and the specification →