1948 California Gold Discovery Centennial, MS64 NGC.
HK-497. A superb example, These were issued by the California Medalists Society, San Francisco, at the request of the state Chamber of Commerce; struck by Irvine & Jachens, Daly City, California. The original mintage was somewhere between 3,000 and 4,000 pieces with approximately 1,000 gold-plated, as this example has been.