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<p>[QUOTE=&quot;physics-fan3.14, post: 2053086, member: 19165&quot;]Well, yet again you are wrong. </p><p><br /></p><p>First - Bugs Bunny Franklins are business strikes, not proofs. </p><p><br /></p><p>Second, the *original* cameo effect on a die of this era was produced by nitric acid pickling, as you mention. However, this effect tended to wear off rather quickly (which is why DCAMs are very scarce, and CAMs are rather uncommon). The mint, realizing that cameo coinage was far more desirable, would repolish the devices to produce a cameo effect. These coins are known, funnily enough, as &quot;repolished cameo&quot; coins. This process began in 1951, and early results were rather crude. Later years got better. </p><p><br /></p><p>I highly encourage you to buy the book, as you have encouraged others. The one you are looking for is &quot;Cameo and Brilliant Proof Coinage of the 1950 to 1970 Era&quot; by Rick Tomaska. There is an extensive description of the process on pages 20 to 22, including how and why it was done, and he calls out a number of specific die pairs which were subjected to the repolishing.[/QUOTE]</p><p><br /></p>

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