AboutMyCoin1938-S Mercury Dime in MS66
A 1938-S Mercury dime graded MS66 is that coin in one particular state of preservation — the date and the mint mark are already fixed, and MS66 is what a grader called the surface that survived. What that looks like on this coin is below. The nearest grade of this date this site does have a researched figure for is Mint State (MS-65), at $56 to $150, from sales and public data.
What MS66 means
A 1938-S Mercury dime in Mint State (MS-66) sits at or near the top of the certified population for the issue: no wear, exceptional lustre, and virtually no marks anywhere on it. At this level the coin is a condition rarity rather than a date rarity, and the price is set by the few collectors who need one and the few coins that exist.
A slab, a dealer’s list or a price guide may write this grade MS-66. They are the same grade and the same 1938-S Mercury dime.
Where this grade sits
The grades a 1938-S Mercury dime is given run from PO1 to MS70. One step up from MS66 is Mint State (MS-67). In general terms, the higher the grade the more the coin is worth.
A blank in the value column is a grade this site has not researched, not a grade the coin is worth nothing in.
How to check this yourself
Sold listings, not asking prices. The link below is already filtered to completed sales of a 1938-S Mercury dime in MS66, 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.
The metal floor under it
$4.65
0.0723 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 1938-S Mercury dime cannot be worth less than the metal in it. That figure is what the premium for MS66 is measured against, and it moves with the metal price rather than with the coin market.
Where these figures come from
We gather publicly available data from several public sources including eBay, PCGS, NGC, Numista, USA Coin Book, PriceCharting, and others.
Not an appraisal. AboutMyCoin estimates from published specifications and does not authenticate or grade coins.
1938-S Mercury Dime: every grade, the metal and the specification →