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<p>[QUOTE=&quot;XanthenX, post: 3150558, member: 97195&quot;]I am well versed on machine doubling caused by a die moving out of position during the impact of the strike as well as split plate doubling, die detereoration doubling and the like. I understand that hub doubling causing the doubled working dies is completely. Some are more difficult to assess than others but I did see a comparison with the 1973 D DDO and was hoping someone had viewed examples of that die variety in order to make a comparison.[/QUOTE]</p><p><br /></p>

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