Watch List notes:

Silver "tumbaga" bar #M-115, 7.08 lb av, marked with finenesses IV IIII (1400/2400) and iUB (1500/2400) and two partial tax stamps, ex-"Tumbaga wreck" (ca. 1528), Garcia-Barneche Plate.10" x 3-1/2" x 1".A thick, rectangular ingot with "sunburst" texture on top surrounding two different sets of fineness-assayer markings (with raised lettering inside boxes), being IV IIII with small s's above and below for 1400 (58.3% pure) and YB13 next to an incuse S and iUB for 1500 (62.5% pure), also with bold partial circular tax stamps near each end, with neatly sliced diagonal assayer's "bite" in one corner, the other side of the bar very granulated and bumpy, even silver color with some toning.From the "Tumbaga Wreck" (ca. 1528), plated on p. 110 of Agustin Garcia-Barneche's The "Tumbaga" Saga (2nd ed, 2018), with Sedwick photo-certificate.
($6000-9000)