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Filled in Mintmarks- What are they exactly??
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<p>[QUOTE="Publius2, post: 25853194, member: 105571"]The die failure described in the OP is typically called a "die chip". The term "die break" is more general and all-inclusive and can also include die cracks. Die chips usually occur where there is a stress concentrator at a small cross-section area of the raised portion of the die. This is most often seen at letters and numbers and is more often seen in small coins where the devices and thus the cross-sections are uniformly smaller and thus the stress concentration higher.</p><p><br /></p><p>These die chips were practically ubiquitous in the early decades of the mint when the die steel was sub-par compared to today. These chips are critical to determining die state and emission order.</p><p><br /></p><p>I collect capped bust half dimes (1829-1837) by die marriage (124 collectible marriages and remarriages) and die chips appear everywhere in this coinage. Below are some of the most commonly see die chips in this series. Note that the die chips occur at sharp corners and at isolated "posts". I've only shown reverse chips but typical die chips on the obverses occur mostly in the loops of the 8 and 3 in the date.</p><p><br /></p><p>[ATTACH=full]1648032[/ATTACH] [ATTACH=full]1648033[/ATTACH] [ATTACH=full]1648034[/ATTACH] [ATTACH=full]1648035[/ATTACH] [ATTACH=full]1648036[/ATTACH][/QUOTE]</p><p><br /></p>
[QUOTE="Publius2, post: 25853194, member: 105571"]The die failure described in the OP is typically called a "die chip". The term "die break" is more general and all-inclusive and can also include die cracks. Die chips usually occur where there is a stress concentrator at a small cross-section area of the raised portion of the die. This is most often seen at letters and numbers and is more often seen in small coins where the devices and thus the cross-sections are uniformly smaller and thus the stress concentration higher. These die chips were practically ubiquitous in the early decades of the mint when the die steel was sub-par compared to today. These chips are critical to determining die state and emission order. I collect capped bust half dimes (1829-1837) by die marriage (124 collectible marriages and remarriages) and die chips appear everywhere in this coinage. Below are some of the most commonly see die chips in this series. Note that the die chips occur at sharp corners and at isolated "posts". I've only shown reverse chips but typical die chips on the obverses occur mostly in the loops of the 8 and 3 in the date. [ATTACH=full]1648032[/ATTACH] [ATTACH=full]1648033[/ATTACH] [ATTACH=full]1648034[/ATTACH] [ATTACH=full]1648035[/ATTACH] [ATTACH=full]1648036[/ATTACH][/QUOTE]
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Filled in Mintmarks- What are they exactly??
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