The 1849 Moffat & Co. coin is a notable example of early California gold coins, minted during the Gold Rush era. These privately minted coins were produced by Moffat & Co., a prominent assay office in San Francisco, and typically carried denominations of $5, $10, and $20. The coins are characterized by their unique designs and the incorporation of gold from local mines, reflecting the economic boom of the time. Collectors value these coins for their historical significance and rarity, with the 1849 issue being particularly sought after in numismatic circles.