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<p>[QUOTE=&quot;Conder101, post: 589247, member: 66&quot;]It is counterintuitive but the greater striking pressure and the double striking done on the proof coins make them &quot;thicker&quot;.&nbsp; Most people would thi that if you strike the planchet with greatpressure you would make it thinner, but it actually results in the edge and rim being more fully struck up to its full squared off thickness and in the case of this coin the metal is actually squeezing out between the collar and the die making the edge thicker still.</p><p><br /></p><p>On a regular pressure strike the metal preses against the collar and forms the reeds, but the edge and rim are almost never fully struck up so instead of the wide square edge you get a bevel fom the rims down to the reeds and a thiner appearance.[/QUOTE]</p><p><br /></p>

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