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<p>[QUOTE=&quot;Conder101, post: 53187, member: 66&quot;]Almost no one slabs cobs because of their irreguar shape.&nbsp; However ANACS at least for awhile did slab some shipwreck siver cob pieces.&nbsp; (If you have the slab book look at ANACS 16.)</p><p><br /></p><p>As for how they are cleaned, they use a mild acid bath.&nbsp; The acid doesn&#039;t attack the gold so that isn&#039;t a problem.&nbsp; It does attack the silver and if you have ever examined any of the silver shipwreck coins you will usually see the etched surfaces from the acid and often lots of hairline from abrasive cleaning that has been done.</p><p><br /></p><p>Why do the services make these exceptions for these shipwreck coins?&nbsp;&nbsp; Money.&nbsp; You go to them an tell them your going to spend a half million to a million dollars with them next month if they will slab them and guess what will happen.[/QUOTE]</p><p><br /></p>

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