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<p>[QUOTE=&quot;Oldhoopster, post: 3348232, member: 84179&quot;]Unless you can show that your coin has provenance to Eva Adams or Lester Merkin, it is going to be extremely difficult to prove that you have an SMS coin.&nbsp; Remember, you are claiming to have a very rare coin and it is believed that all of the known coins have come to market through the Adams/Merkin connection.&nbsp; Finding anything else is going to require extraordinary proof.&nbsp; Just looking like an existing coins isn&#039;t enough.&nbsp; For items like this, you need exact die matches</p><p><br /></p><p>You need at least one of the following to have a shot at an SMS 1) Top tier TPG authentication (obviously), 2) Adams/Merkin Provenance, 3) A top level numismatic researcher such as Burdette or Bowers believing it&#039;s one.&nbsp; 4) An exact die match to an authenticated SMS quarter.&nbsp; Short of that, I think you&#039;re stuck.</p><p><br /></p><p>It is probably going to take a lot of research to find something to back up your claim.&nbsp; You could try the Newman Numismatic Portal</p><p><a href="https://nnp.wustl.edu/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://nnp.wustl.edu/" rel="nofollow">https://nnp.wustl.edu/</a></p><p>&nbsp;&nbsp;&nbsp; </p><p><br /></p><p>I&#039;m sure you have come across these, but I am including some additional info on 1964 SMS coins for anyone else who is interested.&nbsp; They are for the half but have background info</p><p><br /></p><p><a href="https://coins.ha.com/itm/sms-kennedy-half-dollars/1964-50c-sms-ms67-pcgs/a/1239-5545.s" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://coins.ha.com/itm/sms-kennedy-half-dollars/1964-50c-sms-ms67-pcgs/a/1239-5545.s" rel="nofollow">https://coins.ha.com/itm/sms-kennedy-half-dollars/1964-50c-sms-ms67-pcgs/a/1239-5545.s</a></p><p><a href="https://www.pcgs.com/coinfacts/coin/1964-50c-sms/6844" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.pcgs.com/coinfacts/coin/1964-50c-sms/6844" rel="nofollow">https://www.pcgs.com/coinfacts/coin/1964-50c-sms/6844</a> (scroll to the bottom)[/QUOTE]</p><p><br /></p>

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