This is a piece of Roseville Pottery, specifically from the "Bittersweet" line, which was introduced in 1951. About Roseville Pottery: The Roseville Pottery Company was an American art pottery manufacturer established in 1890 in Roseville, Ohio, and later expanded to Zanesville, Ohio. Bittersweet Pattern: This pattern features small berries and floral designs, typically in yellow-orange, green, grey, and yellow colors. Markings: Bittersweet pieces are marked with the raised Roseville USA script mark, along with a shape number and size. Collectibility: Roseville Pottery, including the Bittersweet line, is sought after by collectors due to its historical significance, artistic appeal, and variety of patterns and shapes. The company ceased operations in 1954. There is some crazing in the button of this planter. See photos for details.