***Auction Highlight*** 1853 United States Assay 900 K-18 Calafornia Gold Assay $20 Graded Unc Details By USCG. The U.S. Assay Office gold pieces are normally included in the Territorial and private mint gold coinage of the early West, but in reality the pieces are neither Territorial nor private. The U.S. Assay Office was the forerunner of what would in 1854 become the San Francisco Mint, which began producing quarter eagles, half eagles, eagles, and double eagles in that year. When legislation was passed that required all Assay Office coinage to conform to the Mint Act of 1837, the effect was to have the older dies, with a listed fineness of 880 THOUS, repunched with 900 over the 880. All the pieces made by the U.S. Assay Office are of the 900 over 880 variety, but the under type 880 fades over time. The 900 fine pieces were coined from March 1 to Oct. 30, 1853, with a total production of about 2.5 million pieces. Those dies, perhaps 30 in all, were destroyed in the San Francisco Great Earthquake and Fire of 1906, which ironically left the San Francisco Mint standing amid the rubble of hundreds of other nearby buildings. This piece shows considerable evidence remaining of the 88. While the 9 shows an unrecognizable jumble at the top left loop, the first 0 shows prominent "horns" atop, from the left and right sides of the underlying 8's top loop, which fail to join at the apex of their respective arc. Terrific color and eye appeal. A Corey's Pick, Bid to Win, Don't let it get Away, you might not find its equal Coin. I give this coin my highest recommendation