Mid Century Postmodern Studio Pottery Stoneware Covered Jar

Artist made stoneware covered jar, with hand decorated earthenware exterior and unexpected blue glaze interior. The piece is in perfect condition, free of damage or repairs. The lid has a cut out, probably for a serving spoon, see images. This piece is an example of the American Studio Pottery, Craft Movements of the late 20th C. this example is unsigned.