Watch List notes:

Silver "tumbaga" bar, 2624.4 grams, marked with fineness IUCCCCXXX (1430/2400, 59.58% fine) and serial RC, ex-"Tumbaga Wreck" (ca. 1528), ex-Christie's 1993, ex-Wallace Katz. Approx. 12" x 3-1/2" x 3/8". Typically flat ingot with bold markings clustered near top-left corner on rounded bottom, the other side rough and flaky from the compaction and hasty melting of countless thin sheets, with squarish assayer's "bite" in one corner but no visible tax stamps, from the now-famous first offering of ingots from this wreck by Christie's in April 1993, prior to the conservation of a majority of these bars by Doug Armstrong (therefore not mentioned in his book), also pedigreed to the Estate of Wallace Katz, a well-known collector in New York City. From the "Tumbaga Wreck" (ca. 1528), pedigreed to the Christie's (London) auction of April 1993 (lot 281) and to the Estate of Wallace Katz.
($10000-15000)