FS-302 is a double error on an 1875-S Twenty-Cent Piece. The first error is the misplaced date on the obverse which shows up as a bar in the denticles below the 7 of the date. This occurred when the engraver accidentally dropped a date logotype onto the die, impressing small portions of what appears to be a 5 into the denticles. The second error was a double-punching of the mintmark, sometimes known as an "S over S" variety.
FS-302 is not particularly rare, nor does it command much of a premium, so it is still possible to cherry-pick this variety. Approximately a dozen Mint State examples are known and we fully expect the population to rise as more are found.
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