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<p>[QUOTE=&quot;mynamespat, post: 2699020, member: 83738&quot;]First it&#039;s important to know the differences between true doubled dies and mechanical/die deterioration doubling.&nbsp; Once you can identify mechanical and die deterioration doubling pretty well, you can eliminate a huge amount of possible doubled dies without spending much time on them.</p><p><br /></p><p>Then I use respectable sources such as VarietyVista to find high quality photos of individual features.&nbsp; Coinfacts or HA are invaluable sources to find images of known varieties in high resolution- often being able to compare markers during different die stages.&nbsp; I even like to pull up ebay listings of classified/slabbed varieties to see how the features appear in ebay-seller&#039;s crappy photos.&nbsp; </p><p><br /></p><p>It&#039;s important to recognize the <i>exact</i> features of an individual variety.&nbsp; Die cracks, gouges and scratches are extremely useful, but not completely surefire since they will change during the life of the die.&nbsp; The features of doubled die can become weaker later in a die&#039;s life, but they are otherwise unchanging.[/QUOTE]</p><p><br /></p>

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