This is a sweet salad plate by Canonsburg Pottery! It is decorated with the 'Temporama' pattern, which is totally retro but still looks excellently modern. It is a Dura-Gloss Decoration, made in the U.S.A., and guaranteed oven-proof and detergent proof.
It measures 8" wide and has lightly raised edges to keep food on the plate. It's in overall good vintage condition, with one small line visible under the surface glaze.