Are Dark Tide Relics shipwreck coins authentic?

Every shipwreck coin and artifact sold by Dark Tide Relics is authenticated and accompanied by provenance documentation from recognized authorities such as the Mel Fisher Maritime Heritage Society, NGC, or PCGS, plus a permanent digital provenance record via TreasureCheck.ai.

Which shipwrecks does Dark Tide Relics specialize in?

Dark Tide Relics curates artifacts from the Nuestra Señora de Atocha (1622), Santa Margarita, the 1715 Spanish Treasure Fleet, El Cazador (1784), SS Central America (1857), Maravillas, Concepción, and other documented Spanish colonial and American Gold Rush wrecks.

How are orders shipped?

All orders ship via FedEx, fully insured and with adult signature required on delivery.

Does Dark Tide Relics buy shipwreck coins from collectors?

Yes. Dark Tide Relics actively acquires authenticated shipwreck coins and collections. Submissions can be made through the Sell Coins program at darktiderelics.com/sell-coins.

Why are Spanish coins found on a Portuguese wreck?

During the Iberian Union (1580–1640) New World Spanish silver financed the Portuguese spice trade to Goa, so Carreira da Índia vessels commonly carried Spanish colonial reales.

São José

Lost: 1622
Location: Infusse Reef, Mogincual, Mozambique
Coordinates: -15.0000, 40.7000
Era: Spanish Colonial – Early Core Wrecks
Coinage: cob
Discovered by: 2004 magnetometer survey; excavated 2005
Recovery: 2005
Cargo: Spanish silver reales (Old and New World mints), Silver cobs, Trade goods

São José-attributed material is associated with a Portuguese East Indies vessel lost in the Mozambique Channel region in the early 17th century, and the honest position is that its attribution is unsettled: several vessels carried the name, surviving documentation is thin, and recovery records have at times been conflated with other wrecks in the same waters. What is well grounded is why Spanish silver reales appear on a Portuguese carrack at all — during the Iberian Union of 1580–1640 the Carreira da Índia route from Lisbon to Goa was funded with New World silver. Because the attribution cannot be closed, we treat São José coins as documented Spanish colonial silver with an associated, not proven, wreck story.

What is the São José, and why is attribution difficult?

The Mozambique Channel was one of the deadliest passages of the India route, and Portuguese records for individual losses there are incomplete. More than one vessel bore the name São José. Material reaching the market under that designation over recent decades has, in some cases, been grouped with other Portuguese and Spanish-era wrecks from the same region.

We say this plainly because the alternative is to sell a story we cannot verify. A coin can be a genuine, attributable Spanish colonial real and still carry a wreck name that the documentation does not close.

Our position: buy São José-associated coins for the coin — mint, assayer, date, condition — and treat the wreck line as associated material, not certified provenance.

Why is Spanish silver on a Portuguese ship?

Under the Iberian Union (1580–1640) Spain and Portugal shared a monarch, and the two imperial economies interlocked. Silver struck in Mexico City and the Peruvian mints financed the spice trade out of Goa. Coins minted under Philip II and Philip III travelled from the Americas to Seville and then east to Asia — which is why New World reales turn up on Carreira da Índia wrecks.

That mechanism is also the strongest part of the São José story: the material's composition is consistent with the route it is said to come from, even where the specific hull cannot be pinned down.

What is this material worth?

We have no reliable clearing band for São José-attributed coins — the sample in our published market studies is too small to quote, and an unsettled attribution should not be priced as documented provenance. Price these coins as attributable Spanish colonial silver: mint, assayer, legibility and condition, with no wreck multiplier applied.

How should you buy it?

Attribute the coin first: mint, assayer initial, date bracket, weight.
Ask specifically which recovery the coin came from and what documentation exists — then judge the gap honestly.
Do not pay a wreck premium on an unsettled attribution.
Prefer sellers who state the uncertainty in writing. We do.

Frequently asked questions

Is the São José attribution certain? No. Multiple vessels carried the name, documentation from the Mozambique Channel is thin, and recovery records have at times been conflated with other wrecks. We describe this material as São José-associated rather than certified.
Why are Spanish coins found on a Portuguese wreck? During the Iberian Union (1580–1640) New World Spanish silver financed the Portuguese spice trade to Goa, so Carreira da Índia vessels commonly carried Spanish colonial reales.

Sources

Dark Tide Relics, Report No. 18 — The Silver Highway (the convoy system, the wreck census and the supply logic)
Dark Tide Relics, Report No. 13 — The Attribution Codex
Timothy R. Walton, The Spanish Treasure Fleets (Pineapple Press, 1994; paperback 2002)

A wreck at Infusse reef, Mogincual, Mozambique, tentatively identified as the São José, vice-flagship of a 1622 Lisbon–Goa fleet, destroyed 24 July 1622 in an Anglo-Dutch naval attack in the Mozambique Channel while carrying royal silver.

History

A wreck at Infusse reef, off Mogincual in Mozambique's Nampula Province, has been tentatively identified by researchers — including a UNESCO Silk Roads Programme entry and academic cataloguing of its coin assemblage — as the São José, described as the almiranta (vice-flagship) of a small 1622 fleet that left Lisbon for Goa. She reportedly carried royal silver associated with King Philip III (as Philip II of Portugal). Departing in haste after word of a threatened English attack on Hormuz, the fleet was intercepted in the Mozambique Channel by a combined Anglo-Dutch squadron. Cut off from her consorts and damaged, the ship ran onto a reef and was lost on 24 July 1622, with a reported 300–400 people aboard; sources describe a portion of her silver as taken by the attacking fleet before she went down. Identification of the wreck as São José is described by researchers as tentative, based on the excavated coin assemblage, associated artifacts, and archival correlation with the 1622 fleet — not a recovered ship's register. The name is shared with other, unrelated wrecks, most notably an 18th-century Portuguese slave ship lost off Cape Town, so attribution should always be paired with the specific Mogincual find.

Recovery

A magnetometer survey in 2004 located the wreck (site code MOG-003) at Infusse reef, and a licensed archaeological excavation in 2005 recovered on the order of 24,000 silver reales, from both Old World (Spain) and New World (Mexico, Bolivia/Potosí) mints, along with associated late 16th- and early 17th-century artifacts. The coin collection has since been the subject of academic inventory and publication. No complete manifest for this vessel has been published, and no recovered ship's bell, name-plate, or manifest confirms the São José identification beyond the tentative numismatic and archival case. Collectors should look for documentation tracing coins to the licensed 2004–2005 Mogincual excavation and its published inventory, and should be able to state which mint (Iberian or New World) a given piece is from.

Timeline

1622 — Departs Lisbon — Sails as almiranta of a small fleet bound for Goa, carrying chests of silver reales.
1622 — Attacked and Lost — Engaged by an Anglo-Dutch fleet in the Mozambique Channel and wrecked on Infusse reef on 24 July 1622.
2004 — Site Located — A magnetometer survey identifies the wreck (site MOG-003) at Infusse reef, Mogincual.
2005 — Excavated — Licensed excavation recovers roughly 24,000 silver reales and other artifacts.

Notes

Lost 24 July 1622 at Infusse reef, Mogincual, in an Anglo-Dutch naval attack
Located by magnetometer survey in 2004 and excavated in 2005
Roughly 24,000 silver reales recovered from Old and New World mints
Identification as São José remains a tentative, researcher-stated attribution