Watch List notes:

Medium silver bar from the Atocha (1622), 35 lb 4 oz troy, fineness 2340/2400, Class Factor unknown, Potosi foundry. 3-1/2" x 4-1/2" x 2". With top dimensions about the same as the big "loaf" bars but about half the height, this ingot is much more affordable and manageable, still with clear markings of fineness IIUCCCXL, manifest IIIUCLXXXIIII, owners/shippers E+, R and MA monogram (a combination that somehow represents L. de Castro to F. de la Zerda), silvermaster V (de Vreder), and several tax stamps, also with small double-scoop assayer's "bite" in center, but lacking the mark for foundry/date (hence no better than Class Factor 0.9) and lightly corroded all over. There is also a trace of a B stamp in the middle, which was singled out in Spanish Treasure Bars (Craig and Richards, 2003) as something special (but unknown), and to the right of the fineness is a clear MEX for the MEXIA assayer-mark. From the Atocha (1622), with Fisher photo-certificate #87A-1118.

Estimate: $15000 - 30000