Watch List notes:

Large silver bar #510 from Potosi, 74 lb 3.5 oz troy, Class Factor 0.9, with markings of mine/date Po1621, manifest IIIIUCCCCXCI (4491) and fineness IIUCCCLXXX (2380/2400) followed by cartouche of assayer Mexia, plus various owner/shipper marks and tax stamps, from the Atocha (1622). 13-1/2" x 5-1/2" x 3". Very well-marked and well-preserved specimen of slightly less than average size, with bold manifest and owner/shipper monograms (C. Sanchez and P. Morera), clear but weaker marks of fineness, assayer, tax stamps, date (to left of manifest number) and silvermaster (V), prominent double-scoop "bite" in center. The assigned Class Factor indicates that the Fisher organization must have missed the date on this piece, which should merit a 1.0 Class Factor. From the Atocha (1622), with Fisher photo-certificate. Atocha, sunk in 1622 west of Key West, Florida

Estimate: $20000-30000