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<p>[QUOTE=&quot;Conder101, post: 7409704, member: 66&quot;]Mirrored surfaces, squared rims, squared edge.</p><p><br /></p><p>Frosted proofs didn&#039;t become commonplace until around 1973 when they actually started sandblasting the devices to give them the cameo frosted appearance.&nbsp; before that the cameos were the result of the acid pickling to remove oxides from the surfaces after the hardening/tempering.&nbsp; The surfaces of the die would be slightly roughed from the cleaning and then the fields would be lapped to a mirror polish.&nbsp; but the lap would not get down intot he devices.&nbsp; So the first X number of coins would be cameo, but the moving metal would polish that surface roughness off the devices and the proof would then be brilliant proofs.&nbsp; to make matters worse the dies would also be repolished several times during their lives resulting in brilliant surfaces that often have, to me, a &quot;melted&quot; appearance.[/QUOTE]</p><p><br /></p>

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