I have found both silvers and golds. Now, I have been looking for stuff in the dirt over 50 years, so please keep that time frame in mind. First Spanish silver was back in 1989 or something like that from the Brandywine Battlefield, a holed 1 reale. I found one more and several cut ones in the next couple years. First gold coin was a British Guinea 1774, posted here from 2011. Found the ugliest little gold Mexican coin I think in 2015 and last year my first American gold a $5 piece. Also posted here....somewhere. I have three Spanish silvers in the last month. One from the beach and two from a nearby farm. Before that the last Spanish silver was....uh...I don't remember. Honestly. They don't grow on trees. I got one last year and one in 2011 or 2012. We have an enormous amount of old sites here. All three gold coins came from beaches, 3 different beaches. 1 is a shipwreck coin as are two of the Spanish silvers. It's still a short list. Some folks do much, much better.
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