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<p>[QUOTE=&quot;lordmarcovan, post: 3123404, member: 10461&quot;][USER=96491]@Anna Mullins[/USER]- your coin is a normal business strike cent struck at Philadelphia, not a proof coin struck at San Francisco.</p><p><br /></p><p>A proof coin (struck on special blanks with specially prepared dies) has a totally different appearance.</p><p><br /></p><p>You see, the 1990 &quot;no S&quot; coins that are worth something are all <i>proofs</i>.&nbsp; Proofs were all struck at San Francisco, and <i>should</i> have gotten the &quot;S&quot; mintmark below the date, but some did not.&nbsp; That&#039;s where the error comes in.</p><p><br /></p><p>But a regular <i>business strike </i>coin does not have an &quot;S&quot; mintmark at all in the first place.&nbsp; Business strikes were made at Philadelphia (or at Denver with the &quot;D&quot; mintmark) - not San Francisco.</p><p><br /></p><p>It comes down to being able to recognize a proof coin.&nbsp; I can assure you that the coin you posted in that link is not one.&nbsp; It&#039;s a regular business strike 1990 cent struck at Philly, <i>not</i> a proof cent struck at San Fran with an accidentally missing mintmark.</p><p><br /></p><p>Don&#039;t feel bad, though- this is a confusing distinction to the uninitiated.&nbsp; It trips up lots of folks.</p><p><br /></p><p><img src="https://imgs.inkfrog.com/pix/coop49/1990_1c_Philadelphia_normal_proof_SBS_cent_AAA.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><font size="3"><a href="http://goccf.com/t/278464#2361676" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://goccf.com/t/278464#2361676" rel="nofollow">Source link for image</a></font></p><p><br /></p><p>Had your coin been a proof, it would have an extremely squared off rim and deeply mirrored surfaces with frosty &quot;cameo&quot; contrast on the portrait.&nbsp; </p><p><br /></p><p>Once you&#039;ve seen a proof and a regular business side by side, the difference is usually quite obvious (on these modern coins, anyway).&nbsp; Even moreso than the picture above indicates.[/QUOTE]</p><p><br /></p>

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