According to some online trolling, this logo is from a Robinson Ransbottom Blue Crown 3 Gallon Stoneware crock, made in Roseville, Ohio. I snapped this pic on a recent visit to my parents' place. Mom used the crock as a planter for a large aloe vera plant that, according to family legend, my klutzy brother sat on. The plant, although broken, survived, as did my brother. Isn't the logo a beauty?