1857 S.S. Central America 15.2 gram Gold Nugget – the largest recorded by PCGS. Alongside the bars and coins, there was a large number of nuggets recovered from the shipwreck of the S.S. Central America, which sank in 1857. In addition to these artifacts, golden-brown flakes of gold, otherwise known as “pinches” and typically no more than a gram in weight, had been encapsulated by PCGS. These “slabs” of gold dust have been marketed over the past decade with great success. Alongside the gold dust, and directly after the 1999 Sotheby’s auction of the S.S. Central America artifacts, PCGS adopted an enlarged plastic holder for the larger nuggets recovered from the shipwreck. These nuggets are some of the first examples of nuggets from the excavated treasure of the Central America. We acquired this one from noted numismatist and author John Dannreuther from his personal collection. Encapsulated with an assigned weight without a grade in a PCGS holder #12415.