19lb Factor .8 "Atocha 1622 Shipwreck" Silver Bar

A Treasure from the Depths: An Exceptionally Rare Silver Ingot from the Atocha Shipwreck (1622)

The tragedy of the Nuestra Señora de Atocha is one of the most storied shipwrecks in maritime history, and its salvaged treasures rank among the most coveted in the collecting world. Laden with immense wealth from the mines of the New World, the Atocha sank off the Florida Keys in September 1622 during a violent hurricane, taking with her a staggering cargo of gold, silver, and emeralds intended for the coffers of Spain’s King Philip IV. For over three and a half centuries she lay entombed beneath the sea until Mel Fisher and his team triumphantly rediscovered her in 1985, revealing riches that had remained hidden since the height of the Spanish Empire.

While most surviving Atocha silver ingots are the massive 70–90 pound “standard” bars produced for bulk transport, the present example—at a very rare and eminently displayable 19 lb 1 oz troy—stands as one of only a handful of such smaller-format ingots known (fewer than half a dozen recorded). Its compact size makes it both historically important and uniquely manageable, a relic of extraordinary rarity.

Marks of Empire and Provenance

Cast in 1622 at Potosí, the famed silver mountain of the Viceroyalty of Peru—arguably the single richest silver source in world history—this ingot bears a suite of official markings that reveal the highly regulated system of colonial bullion production:

• “Po1622”: identifying both origin and year, linking it directly to the Atocha’s ill-fated voyage.
• Fineness Stamp: IIUCCCLXXX (2380/2400), an astonishing purity of 99.17%, among the highest achievable standards of the era.
• Manifest Number: IULXXIX (1079), directly connecting this bar to its entry in the Atocha’s official cargo register.
• Merchant Marks: including “MB” and a double-cut A-diamond, symbols of the financiers who underwrote this treasure.
• Silversmith’s & Crown Marks: the silvermaster’s “B,” along with faint royal tax stamps, evidence of the Spanish Crown’s quinto real—the royal fifth levied on all colonial wealth.
• Assayer’s Cartouche: a faint imprint attributed to Mexía, the official responsible for verifying its purity.
• The “Bite Test”: a distinctive double-scoop cut taken from the bar itself, the physical proof of assaying practices used to certify fineness before shipment.

An Enduring Legacy
Unlike the immense and unwieldy 80-pound bars that dominate the Atocha’s silver cargo, this 19-pound ingot is as exceptional in rarity as it is in presentation. It represents not only the vast mineral wealth extracted from the Andes but also the fragility of Spain’s imperial reach, embodied in the shipwreck that robbed a king of his treasure and preserved it for posterity.

Today, such a bar is more than a precious-metal artifact; it is a museum-worthy testament to exploration, empire, and loss. To hold it is to grasp the tangible legacy of one of history’s greatest shipwrecks.
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