i have a1952d penny with an J and an S stamped on it.......by it;s face....
Date? grade? is it US?
As of July 11 2012 a 1955-S US penny in MS-60 condition is worth around 35 cents.
Assuming you mean Wheat penny's, the 1909-S V.D.B., 1914-D & 1931-S are the icons of the series.
The US Mint did not issue an 1896 nickel with an "S" stamped on it. If you have one then it would seem as though someone stamped the coin sometime after it left the mint. Also please don't assume that because a coin is old it has to be made of silver. All US nickels except special "war nickels" made during 1942-45 are struck in the same alloy of 25% nickel and 75% copper.
Not that valuable. Probably 10 to 20 cents, depending on its condition, except for the extremely rare 1944 D/S (where an S was stamped over the D), which could be worth $70 to $150.
It is probably not mis-stamped. Most likely the number 9 became partly filled in on the die and only a part of the number shows. Sometimes if the number is completely filled in the number does not show at all.
It is worth face value unless it has a S under the date.
SS stamped on jewelry means Sterling Silver. Some other common stamps for Sterling Silver are "925" "S/S" "ster" "sterling" and "sterling silver" SP stamped means "Silver Plated" - No Real Value because it is only a coating that is put over a less valuable metal such as Brass or Copper.GP stamped means "Gold Plated" (same as above)Common stamps found on Gold are 10k, 14k and 18k (they could also be stamped with a three digit number: 416 (same as 10k), 585 (same as 14k) and 750 (same as 18k)
Circulated US wheat cents from the 40's & 50's are very common and most only have values of 3 to 10 cents.
If it's a small letter below the date, it's a mint mark indicating the coin was struck (not "stamped", btw) at the San Francisco mint. S-mint coins are sometimes worth a bit more than ones from Philadelphia or Denver, so you might want to post a new question with the coin's date. If it's located anywhere else it was added by someone after the coin was struck, and the coin is only worth a penny because it has been damaged.
Will Penny