Watch List notes:

Silver "tumbaga" bar #M-16, 5 lb 6-1/4 oz av., marked with serial RC, assayer B~Vo and fineness (IU)9CCCC L x x (1970/2400 = 82% fine), from the "Tumbaga wreck" (ca. 1528). 7" x 3" x 7/8". A neatly cast and attractive "flat brick" with small cluster of markings all in one area including a partial circular tax stamp that shows the all-important (C )AR(OLVS), light silver color with toning in markings, diagonal assayer's "bite" in one corner. From the "Tumbaga wreck," sunk ca. 1528 off Grand Bahama Island

Estimate: $4000 - 6000