What this coin looks like (obverse, reverse, mint mark location, special features, etc.):
One major variety of the 1827 Capped Bust Half Dollar features a square base on the number "2" in the 1827 date. The base is flat and comes up at a square angle at the end - unlike the curled and curved base 2 variety. The difference between the Square Base 2 vs Curled Base 2 varieties is depicted below in the example comparison image:
Coin valuation chart: Typical coin prices, values and worth per grade or condition - in USD