Vintage 70s Crock Pot Slow Cooker 3.5 Quart Stoneware Avocado Mushrooms Tested Works. This is the kind of crock pot that has the crock fixed in place. It heats around the sides. Has some scratches on outside and 2 sizable knicks in lid, as shown in photos. Neither affect function. Crock itself is flawless. Please click through to zoomable images for details and measurements.