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<p>[QUOTE=&quot;Dafydd, post: 26656050, member: 86815&quot;]I believe you hit the nail on the head [USER=110226]@robinjojo[/USER] , salinity and of course in some areas such as Europe, strong tides.</p><p>These two coins came from the Sao Jose which was salvaged in the Mozambique Straits with strong currents.</p><p>If you look at a São José coin, it often looks &quot;smooth&quot; or has soft, rounded details compared to a &quot;Grade 1&quot; <i>Atocha</i> coin. I believe there are two main reasons for this:</p><p><br /></p><p>The São José sank in relatively shallow water on a coral reef in an area with extremely high surge and currents.</p><p>For nearly 400 years, the coins were tossed around in a slurry of abrasive sand and coral fragments. I call this the &quot;Maytag&quot; effect.</p><p>I picked this set up inexpensively on Ebay and was very pleased as these are,in my opinion, the definitive East Indies Spice Trade coins. Most I&#039;ve seen are a bright matt white and are overshadowed by Atocha coins so can still be picked up reasonably.</p><p>I think the comment &quot;prestigious Shipwreck effect&quot; is somewhat overstated.</p><p>[ATTACH=full]1700628[/ATTACH]</p><p><br /></p><p><i><b>[ATTACH=full]1700632[/ATTACH]</b></i></p><p><i><b><br /></b></i></p><p><i><b>These are the original sale details.</b></i></p><p><i><b>KINGDOM_EMPIRE </b></i> MEXICO UNDER SPAIN</p><p><i><b>TITLE </b></i> SAN JOSE SHIPWRECK COIN SET</p><p><i><b>DENOMINATION </b></i> REALES</p><p><i><b>UNIT </b></i> 8 &amp; 4 REALES</p><p><i><b>DATE </b></i> 1618-1622</p><p><i><b>MATERIAL </b></i> SILVER</p><p><i><b>RULER </b></i> PHILIP III / IV</p><p><i><b>REGION </b></i> MEXICO</p><p><i><b>MINT </b></i> MEXICO</p><p><i><b>CATALOG </b></i></p><p><i><b>CONDITION </b></i> Grade 2</p><p><i><b>CERTIFIEDBY </b></i> NGC</p><p><i><b>OBVERSE </b></i> Mexico 8 Reales (1618-1622) # Grade 2 Shipwreck Effect</p><p>Mexico 4 Reales (1618-1622) # Grade 2 Shipwreck Effect</p><p>Elegant hardwood presentation case with inlaid detailing, protective lock, and key.</p><p>Certificate of Authenticity signed by the CEO and Co-founder of Arqueonautas Worldwide, confirming the origin and authenticity of these historical artifacts.</p><p>Historical Significance:</p><p>Bound for Goa, the Sao José ship was part of a fleet dispatched from Lisbon in 1622, transporting royal treasure for the Portuguese Empire. After fierce battles and enduring Dutch and British attacks, the Sao José tragically sank off Mozambique&#039;s coast. Rediscovered nearly 400 years later in 2005, these coins serve as tangible relics from a pivotal period in maritime history.</p><p><br /></p><p>NGC Certified: Professionally authenticated and graded by Numismatic Guaranty Corporation (NGC), these coins bear the prestigious &quot;Shipwreck Effect&quot; certification, ensuring their provenance and increasing collectible value.</p><p><br /></p><p>Condition:</p><p>Coins: Preserved and encapsulated, bearing typical #shipwreck effect# patina reflecting centuries underwater.</p><p>Presentation Box: Overall excellent condition, with very minor signs of storage wear (visible in photos).[/QUOTE]</p><p><br /></p>

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