I believe you may be mistaken on that point.
Let me explain:
There are several examples of one thing common to recovered Jesuit Gold and Silver Ingots. The Cross and "V".
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You can even see it in an old Jesuit emblem:
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Now to the Atocha Bars connection:
The very first Silver Ingot found from the Atocha was named the "Discovery Bar". The greatest majority of the bullion was taken aboard at Portobelo, Panama. This bar was different. It was taken aboard at Cartagena de Indias (Cartagena, Columbia). It was listed in the manifest as payment to the crown as a tax levied against slave trading by a Portuguese Slave Trader named Duarte de Leon Marquez. The experts on Siglas could only guess at the siglas of the previous owners of the ingot. Here is page 59 of "Spanish Treasure Bars from New World Shipwrecks":
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Click on the photo a few times to enlarge it. If you look at the sigla on the right side, you will see what is described by the author: An "A" above a cross. Now, look at the rest of the Roman Numerals and letters on the bar (fineness, weight, tally number). They are all upside down. If you turn the bar over (where all the Roman Numerals and letters are readable), now look again at that sigla. It is our old friend the cross above the "V":
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Cartagena Columbia was the port closest to the Jesuit Reducciones in Bolivia. It would have been the logical place for them to have bought slaves coming over from Africa. Did I mention that the Jesuits were the largest slaveholders in the New World? Also anybody that knows how religious the Spanish were/are would know without doubt that the Catholic Spaniards would NEVER (I REPEAT NEVER) subjugate a cross UNDER anything. A cross would always be at the top of a sigla. My reading of the ingot (with the Jesuits as the previous owner) is this: Whomever "B" is (the cross and "V" are stamped on top of it) had tithed this bar to the Order. The Order used it (and possibly more still unfound) to purchase slaves in Cartagena. This particular ingot (and possibly others unfound) were marked on the manifest tally to pay taxes on profits from trading slaves, and were also marked with Marquez' Sigla as the new owner, so the crown would know who sent the bar to Spain.
This one bar remains the best evidence that treasure bars that came along much later with the Cross and "V" are likely to be authentic. Many were declared fakes because this marking was found nowhere in known documents or found on any ingots with known provenance. This ingot went to the bottom of the Caribbean/Atlantic (Southeast of the Florida Keys) in 1622, and didn't see the light of day again until 1973.
Mike