What this coin looks like (obverse, reverse, mint mark location, special features, etc.): 1849/6 is one of the major overdate varieties of the 1849 Seated Liberty Half Dime. Please note that there is active debate and confusion among experts in the numismatic field on whether this is actually an 1849/8 overdate or 1849/6 overdate error. In more recent times the consensus has been leaning towards 1849/6 (9 Over 6). Source of example image is courtesy of Heritage Auctions.
Coin valuation chart: Typical coin prices, values and worth per grade or condition - in USD