What this coin looks like (obverse, reverse, mint mark location, special features, etc.):
This is a Jefferson Nickel mintmark variety. Depicted in the image above: The S mint mark is stamped on top of a subtle D mint mark. Typically this can be best identified by a small portion of the D mark being seen below and within the S mark.
Coin valuation chart: Typical coin prices, values and worth per grade or condition - in USD