The State Assay Office was authorized on April 12, 1850. That year, Governor Peter Burnett appointed F.D. Kohler, who thereupon sold his assaying business to Baldwin & Co. He served at both the San Francisco and Sacramento offices. The State Assay Offices were discontinued at the time the U.S. Assay Office was established, on February 1, 1851.
Ingots issued ranged from $36.55 to $150. An Extremely Fine specimen sold in the Garrett Sale, 1980, for $200,000. Each is unique.