California Pottery refers to Art Pottery from various companies in the mid 20th century. The most common and familiar are the brightly colored pieces from the 1960s that are usually marked simply Calif. with a letter and number. The example pictured was picked up at a yard sale in NJ a few years ago and is now for sale in my Etsy store. The most common colors are orange and turquoise. A few years ago I found a six piece chip and dip on a Lazy Susan in pink and black. It fetched a good price on eBay. My wife would not let me keep it! She is not a big retro fan!