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<p>[QUOTE="mikediamond, post: 87821, member: 1859"]As Conder101 says, these are concentric lathe marks. A working hub was not polished (or was inadequately polished) after the cone-shaped face was machined. It was hubbed like this and the concentric lines were preserved. Concentric lathe marks are best known from the die pair that produced this 1996-D cent. However, I've seen a clear case in a 1999 or 2000 nickel. I'd have to dig it out to firm up the date.</p><p><br /></p><p>Concentric lathe marks are quite rare, but there's little demand for this sort of error.[/QUOTE]</p><p><br /></p>
[QUOTE="mikediamond, post: 87821, member: 1859"]As Conder101 says, these are concentric lathe marks. A working hub was not polished (or was inadequately polished) after the cone-shaped face was machined. It was hubbed like this and the concentric lines were preserved. Concentric lathe marks are best known from the die pair that produced this 1996-D cent. However, I've seen a clear case in a 1999 or 2000 nickel. I'd have to dig it out to firm up the date. Concentric lathe marks are quite rare, but there's little demand for this sort of error.[/QUOTE]
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