Message:

<p>[QUOTE=&quot;AgCollector, post: 291901, member: 5928&quot;]Since this one is a 1991D, we know that it should be copper-coated zinc.&nbsp; Because of their vastly different melting points, with copper at 1085 C and zinc at 420 C, it is possible to heat it to say 500 C and have a liquid inner zinc core and a thin solid copper outer shell.&nbsp; Now imagine just bumping it with something- the copper deforms and the zinc flows.&nbsp; Upon cooling, it would look like the cent you have.&nbsp; I think this is what happened mainly because all the details of Lincoln&#039;s face are still on the &quot;dented&quot; parts whereas if it were a problem with the planchet before being struck it would not have struck normally.</p><p><br /></p><p><br /></p><p><br /></p><p><br /></p><p><br /></p><p>You&#039;re correct about the weight and it being a 95% copper cent- there is a common chemistry demonstration that takes a copper cent and coats it in a thin layer of zinc to make &quot;silver pennies&quot;.&nbsp; The next (optional) step is to put it in a bunsen burner and let the thin surface layer of zinc mix with copper to make brass, thus creating &quot;gold pennies&quot;.</p><p><br /></p><p>Bottom line, in my opinion both have been experimented on and are neat finds, just not something to send in as a true mint error.[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in