What this coin looks like (obverse, reverse, mint mark location, special features, etc.):
One major variety is the 1800/79 Draped Bust Large Cent (Penny) with the "Style1" hair design on the obverse of the coin. The overdate error features a 1800 date struck over a 1798 date. The "7" shows up under the "8" but the "9" is nowhere near as prominently visible as it is in the "80" over "79" variety. In addition: The design of the hair on the liberty is the older "Style 1 Hair" used without the extra curl above the shoulder (which was introduced in the Style 2 Hair). The Style 1 Hair was last used in 1798. The difference between the 1800 Style 1 Hair vs Style 2 Hair is depicted below in the example comparison image:
Coin valuation chart: Typical coin prices, values and worth per grade or condition - in USD