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<p>[QUOTE=&quot;Collecting Nut, post: 7829902, member: 74863&quot;]The best I can do for a blow hole error is that is a defect in the planchet. They form ragged holes. They develop in the coin metal strip as it’s rolled out. The stresses tear apart in areas that are stiff and brittle.[/QUOTE]</p><p><br /></p>

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