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<p>[QUOTE=&quot;expat, post: 7586275, member: 111067&quot;]The reason why people can be distinctive between the two (MD and DDD) is other visible markers on the coin. MD occurs when the die is not quite secure and &quot;bounces&quot; in whichever direction when striking the planchet, giving that known look of &quot;flat and shelf like&quot; in one direction.</p><p>DDD is when the upper edges and the walls of the incused part of the die (the devices) start to crumble with overuse. Often accompanied by radial flow lines in the field. MD and DDD can be observed together on some strikes[/QUOTE]</p><p><br /></p>

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