What this coin looks like (obverse, reverse, mint mark location, special features, etc.):
One major variety is the 1812 Classic Head Large Cent (Penny) with a Small Date. Most notable is how the numbers in the 1812 date are shorter and smaller than the large date variety. The differences between the small date vs large date can be seen visually in the comparison example image of the coins below:
Coin valuation chart: Typical coin prices, values and worth per grade or condition - in USD