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<p>[QUOTE="mikediamond, post: 335639, member: 1859"]Bi-level die cracks do not appear to signal an imminent demise of the die, in the same way that conventional die cracks don't imply an imminent breakdown. For example, the "cracked skull" Lincoln cents of the 1950s feature bi-level die cracks, and most of these dies struck numerous examples. Bi-level die cracks are of interest in that they document a degree of plastic deformation that is greater than most people think die steel is capable of.[/QUOTE]</p><p><br /></p>
[QUOTE="mikediamond, post: 335639, member: 1859"]Bi-level die cracks do not appear to signal an imminent demise of the die, in the same way that conventional die cracks don't imply an imminent breakdown. For example, the "cracked skull" Lincoln cents of the 1950s feature bi-level die cracks, and most of these dies struck numerous examples. Bi-level die cracks are of interest in that they document a degree of plastic deformation that is greater than most people think die steel is capable of.[/QUOTE]
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