Assuming this question is about what the coin is worth, the value depends on condition. A worn '16-S dime is worth about $2.50 just for its silver content, while an uncirculated coin is worth around $30.
The difference (and the value) is where they were made. S= San Francisco, D= Denver.
dime = 10 cents
The 1945 nicro S Mercury Dime is 90% Silver Mercury Dime that was minted in San Francisco. San Francisco used different types of punches in 1945.
For 1916 Mercury Head dimes. The mintmark (D or S) is on the reverse of the coin, just to the right of the E in ONE. 1916 Barber dimes have them below the wreath on the reverse, it can only be a S.
The Mercury Dime was minted in all three mints, Philadelphia, Denver, and San Francisco. Not all three mints minted the Mercury dime every year. There were no Mercury dimes from the Denver mint in 1923-D or 1930-D. If you ever see one, it's a counterfeit coin. There was never a 1934-S dime minted either.
The 1894-S dime is considered the rarest Mercury dime, with only 24 known to exist. This coin is highly sought after by collectors and can fetch a high price at auctions.
The difference (and the value) is where they were made. S= San Francisco, D= Denver.
dime = 10 cents
The 1945 nicro S Mercury Dime is 90% Silver Mercury Dime that was minted in San Francisco. San Francisco used different types of punches in 1945.
It's a mistake.
For 1916 Mercury Head dimes. The mintmark (D or S) is on the reverse of the coin, just to the right of the E in ONE. 1916 Barber dimes have them below the wreath on the reverse, it can only be a S.
The 'S' stands for the mintmark for the San Francisco mint.
A 1916-S Barber Dime in about good condition (AG3) is worth: $2.50.
The Mercury Dime was minted in all three mints, Philadelphia, Denver, and San Francisco. Not all three mints minted the Mercury dime every year. There were no Mercury dimes from the Denver mint in 1923-D or 1930-D. If you ever see one, it's a counterfeit coin. There was never a 1934-S dime minted either.
I also have a 1917 s mercury dime it appears to hace dubbling on the B ,,,as most will tell tou uts worth as much as someone is willing to pay!
If you have a so-called "Barber" dime (named for its designer, not a hair cutter) there won't be a D mint mark because that design was struck only at Philadelphia and San Francisco.If you have a Mercury head dime the mint mark position will be to the right of the E in ONE on the back. It may be blank (Phila.), or there may be an S or D.
That would be the 1916-D with a mintage of 264,000. However, the 1941/1942 overstrike error with an unknown mintage is also in demand by collectors. More information can be found at this website : http://coins.about.com/od/coinvalues/qt/mercury_keys.htm