1860 $10 Clark, Gruber & Co. PCGS AU50. K-3, Rarity-5. This stunning example was last seen on the market in 2010, where it was described as “The 1860 and 1861 Clark, Gruber ten dollar pieces are the largest of the firm’s denominations usually seen, as the 1860 twenty dollar is extremely rare, with the 1861 making only an occasional appearance. During its short production of gold coins, the firm made nearly $600,000 worth before switching to the production of gold bars.
The 1860 Clark, Gruber tens are also quite elusive in AU or finer grades. Those coins deviated from the federal-style obverses of the quarter and half eagle, featuring instead a rather laughable attempt at depicting Pike’s Peak as a triangular monolith with a few trees at its base. This admirable AU example displays generous luster remaining on yellow-gold surfaces that are free of major contact marks.”