Spanish Tumbaga silver bar, recoved from an early 16th century Spanish shipwreck. 14.84 pounds.

Ancient Coins - Spanish Tumbaga silver bar, recoved from an early 16th century Spanish shipwreck. 14.84 pounds.
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This bar was one of more 200 silver and 20 gold bars salved by the Marex Corporation in 1992 from just off the Grand Bahama Island.  The name of the ship has never been proven (that would normally require finding the ships bell), but the best research to date suggest it was the Santa Maria de la Concepcion, which sank off the Bahams during a storm in 1528, making this the earliest Spanish treasure ship yet discovered.

This particular bar is recorded for the salvage as tag number M-4, and is accompanied by a photo certificate, signed by Daniel Frank Sedwick.   It is also accompanied by a book written about the treasure (in which the markings on this bar are illustrated and discussed), as well as a copy of some later research discussing the wreck and why they believe it was the Santa Maria de la Concepcion.

Tag Number : M-4.

Size : 340 x 109 x 18 mm

Weight : 6731.4 grams (14.84 pounds)

Date : The wreck is believed to have sunk in 1528.

There are four markings on the bar, enlargements of which can see on the lower part of the image. 

To the right and left sides are two partial rounded tax stamps maning Charles V of the Holy Roman Empire (also  known as Charles I of Spain) who ruled from 1521 to 1556.   As with all such bars, only a fragment of each stamp was impressed into each bar, but by examing enough bars the entire stamp was reconstructed and shows a Spanish style castle surrounded by the inscription 'CAROLVS QVINTAVS IMPERATOR'.  On the left side stamp we can read the 'ARO' of CAROLVS.  On the right side stamp we can see 'IMP' of  IMPERATOR.

Below, and slightly to the right of the left side tax stamp is a small mark that reads YB13 (but the B is mirrored) which is tentatively identified as a code for 1513, but that reading is by no means certain, and what it means is also uncertain but it seems a little too early to be a date.

Just to the right if the YB13 is another stamp which contains a coded assey result of LEY 1450, meaning the bar is 1450 parts per 2400 silver (60.48% silver), recording the  Spanish assayers test result from the small piece he removed from the upper right corner (all of the bars have at least one such small pice removed by an assayer).

This particular bar has not had a modern assay  done, but on the bars from the shipwreck that were recently assayed, the old Spanish assays tended to be accurate to within 2% but gave a combination gold and silver content.  Of the bars tested, the gold content ranged from 0.44% to 6.2% with an average of about 3%. 

Assuming this bar contains the average of about 3% gold, that leaves 57.5% silver.  Based on that assumption it would contain 125 ounces of pure silver, and 6.5 ounces of pure gold, but it would take a modern assay to confirm this.

These bars did not suffer from any serious salt water corrosion, and the rough surface textures are the result of the casting technique used to make them, and are how they would have looked when new.
价格 品种: vcoin950
US$ 4,500.00
  • € 3,684.60
  • £ 3,222.84
  • AUD 5,909.36
  • CHF 4,400.88
  • CAD 5,770.82

利率: 04/24/18

发货从: Canada