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<p>[QUOTE=&quot;robinjojo, post: 8122242, member: 110226&quot;]I read about this discovery today, and I though I saw a couple of tetradrachms, possibly from Antioch.</p><p><br /></p><p>As for preservation, the state of any given coin salvaged from the ocean depends on where it is buried, the amount of oxygen it is exposed to and the salinity of the water.&nbsp; </p><p><br /></p><p>My experience with salvaged coins, all silver, is that coins exposed to these elements, say, on the outside of a pile or found individually on the ocean floor, are often very corroded, while those that are fortunate to be more protected can retain much, if not all their original surfaces and detail.&nbsp;&nbsp; </p><p><br /></p><p>Another critical element in a salvaged coin&#039;s condition is the restoration or preservation method employed after the coins are removed from their oceanic environment.&nbsp; Some salvors opt for a relatively quick method of cleaning these coins, such as electrolysis, a method that basically strips away the heavy oxides that often accompany these coins.&nbsp; While fast and economic, the coins usually emerge overly bright and basically quite unappealing in appearance.&nbsp; A more labor intensive method, such as careful manual cleaning, can yield much better results.[/QUOTE]</p><p><br /></p>

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