From 1962 to 1988, the San Francisco Mint was officially an assay office; the San Francisco Assay Office was granted mint status again on March 31, 1988
And this was new on me back in the day – it’s the Mint Police, as seen on Haight:
The Mint Police they live inside of my head.
The Mint Police they come to me in my bed.
The Mint Police they’re coming to arrest me oh no.
Established in 1792, the United States Mint Police is one of the oldest federal law enforcement agencies in the nation. Responsible for establishing the standard, “As secure as Fort Knox,” our officers continue to meet that standard everyday. The U.S. Mint Police are responsible for protecting over $100 billion in Treasury and other Government assets stored in facilities located at Philadelphia, PA; San Francisco, CA; West Point, NY; Denver, CO; Fort Knox, KY; and our headquarters in Washington, DC.
Today, U.S. Mint Police Officers have the primary responsibility for protecting life and property, preventing, detecting, and investigating criminal acts, collecting and preserving evidence, making arrests, and enforcing Federal and local laws.