Massive Gold Bullion Bar recovered from the S.S. Central America shipwreck.OBV: // No. 708 / 32.15 Oz / 882 FINE / $586.17 //. REV: // 708 //. RIGHT SIDE: // KELLOGG / & / HUMBERT / ASSAYERS // (outlined with rectangle). Measures 1-5/8 x 1 x 2 inches. Two assay chips removed from opposite corners. As it turns out, this ingot is accidentally metric. The 32.15 troy ounces stamped on the bar equals one kilogram.Augustus Humbert and John Glover Kellogg are among the most famous assayers in California Gold Rush history. Kellogg has previously been in partnership with Richter, then John Hewston (1854-55). The Kellogg & Humbert partnership formed in 1855 and lasted till 1860. In addition to the ingots, the firm minted gold coins to fill the void left by the recently opened San Francisco Mint who couldn't keep up with the Gold Rush demand. They were among the most active and prolific issuers of gold bullion in both ingots and coins during the mid-1850s. After 1860, Kellogg left the partnership and Humbert partnered with Hewston.Of the 577 gold bars recovered from the S.S. Central America shipwreck, 373 were made by the Kellogg & Humbert firm, clearly demonstrating their dominance and reputation. ***Please see Fred Holabird's Essay about Kellogg & Humbert, available here: https://online.pubhtml5.com/esfe/wtez/#p=248Provenance: SS Central America Collection