Benicia is a small town near San Francisco, California. It was a US Army base during the California Gold Rush and was briefly the state capitol in the 1850's. The Benicia Museum has a few small Roman and Greek coins on display. Benicia Museum - Roman and Greek coins The upper left coin is a Roman coin of the emperor Antoninus Pius.
Another coin on display at the nearby Benicia State Capitol building, a half dollar from the year that Benicia was the state capitol: United States half dollar 1853 This coin looks like it has seen some service.