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<p>[QUOTE=&quot;Clawcoins, post: 3509991, member: 77814&quot;]chin is probably just mechanical doubling.</p><p><br /></p><p><br /></p><p>some background info ...</p><p>1982 was a transitional year for the CENT.</p><p>They went from basically a copper disc for the entire thing,</p><p>to a zinc disc that has an 8 micron thin copper plating over it.</p><p><br /></p><p>This creates a situation similar to paint over steal such as with a car.&nbsp; Except worse.&nbsp; So the paint will bubble, etc as the underlying steel rusts.</p><p><br /></p><p>You&#039;ll see a lot of plating problems on 1982 and current cents, which are commonly called &quot;zincolns&quot;.</p><p><br /></p><p>zinc reacts to water/steam except much quicker than steel would.</p><p>Your cent isn&#039;t that bad, you&#039;ll come across many that will be much, much worse.</p><p><br /></p><p>more info:</p><p><a href="https://www.coinworld.com/news/us-coins/2016/08/unexpected-bumps-on-coins-surfaces-vary.all.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.coinworld.com/news/us-coins/2016/08/unexpected-bumps-on-coins-surfaces-vary.all.html" rel="nofollow">https://www.coinworld.com/news/us-coins/2016/08/unexpected-bumps-on-coins-surfaces-vary.all.html</a></p><p><br /></p><p><br /></p><p><font size="3"><b>5. Plating blisters</b></font></p><p>Plating blisters develop in the coin in the immediate aftermath of the strike, as gas expands between the core and poorly bonded plating. Among domestic coins, <i><u>plating blisters are the exclusive province of copper-plated zinc cents</u></i>. Blisters are generally small and subcircular, with a smooth surface and soft outline. They can occur anywhere on the field and design. The design continues uninterrupted as it crosses a blister.</p><p><br /></p><p><font size="3"><b>6. Occluded gas bubbles</b></font></p><p>Solely the province of solid-alloy coins, occluded gas bubbles form just beneath the surface and push up the overlying metal immediately after the strike. Like plating blisters, the surface is smooth and the edges soft. The design is uninterrupted.</p><p><br /></p><p><font size="3"><b>7. Corrosion domes</b></font></p><p>Contaminants trapped beneath or penetrating the surface of aluminum, <i><u>plated zinc</u></i>, and plated steel coins can react with surrounding metal to form an expanding front of spongy, corroded metal. The resulting solid dome will superficially resemble a hollow plating blister or occluded gas bubble. In many cases the corroded metal bursts through and may fall out, leaving a crater.[/QUOTE]</p><p><br /></p>

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