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<p>[QUOTE=&quot;Alabama Stacker, post: 26763916, member: 136297&quot;]Google&#039;s AI seems to have hallucinations about some coins.&nbsp; I just acquired a number of Morgans marketed as &quot;XF,&quot; and they are indeed nice. One 1879-O looks extra nice (CoinKnow rated it a 60, and I agree) so I asked Google AI about the value.&nbsp; Among other things, it said the following:</p><p><br /></p><p>&quot;Variety Check</p><p>Look closely at the reverse. There is a rare variety called the 1879-O &quot;Large O&quot; (where the mint mark is significantly bigger). If you have a confirmed &quot;Large O&quot; in XF condition, the value can jump to $250–$400+.</p><p><br /></p><p>To identify the 1879-O Large O vs. Small O, look closely at the mint mark on the reverse of the coin, located above the letters &quot;D&quot; and &quot;O&quot; in the word &quot;DOLLAR&quot;.</p><p><br /></p><p>The Difference</p><ul> <li>Small O (Common): This is the standard mint mark used for the majority of the 2.8 million coins struck in New Orleans that year. It is a relatively small, neat oval.</li> <li>Large O (Rare): This is a specific variety (often cataloged as VAM-26) where a larger &quot;O&quot; punch was used. It appears thicker and fills more of the space between the eagle&#039;s tail feathers and the wreath.&quot;</li> </ul><p>I got a bit excited, because the &quot;O&quot; definitely looks larger on this one than the O on some other dates I have.&nbsp; I tried to find comparison pictures or any other info on this and found nothing anywhere.&nbsp; I looked and looked!&nbsp; Today, I went back to Google&#039;s AI again, and now it says this:</p><p><br /></p><p>&quot;</p><p>While the term &quot;Large O&quot; is often used by collectors to describe a standard mint mark, the 1879-O Morgan silver dollar does not have a officially recognized &quot;Large O&quot; vs. &quot;Small O&quot; variety in the same way the 1879-CC (Carson City) does. </p><p>However, there is a very rare and valuable variety called the 1879-O/S (O over S), where an &quot;O&quot; was punched over an &quot;S&quot; mint mark. If you are seeing something unusual about the mint mark, it may be one of these:&quot;</p><p><br /></p><p>So that kind of let the air out of my balloon.&nbsp; Has anybody ever heard of this &quot;large O/small O&quot; mint mark business?&nbsp; Or was this an AI hallucination?[/QUOTE]</p><p><br /></p>

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