Watch List notes:

Silver "tumbaga" disk, 4989 grams, fineness 1750/2400, marked with serial number RLxxx, assayer B~Vo and fineness iV9CC L, uncleaned, from the "Tumbaga wreck" (ca. 1528), ex-Christie's. About 8" in diameter and 1" thick. Nearly round, with 1" sprue or gate on side from casting, pitted (as made) but flat topside with clear markings of assayer, serial number and fineness all in a small area in the middle and at least three partial tax stamps closer to the edge, rough bottom loaded with whitish-greenish encrustation, dark all over and with inked number from salvagers on top as among a select few ingots that were sold off before official (Armstrong) conservation. From the "Tumbaga wreck" (ca. 1528), and pedigreed to the original Christie's (London) auction of April 1993, with original lot-tag #282.

Estimate: $3000