Vintage deviled porcelain egg plate, with rooster

Vintage Beautiful White Glaze with Colorful Red & Yellow & Brown Rooster in the center. Has 12 slots for Deviled Eggs. Has pretty Scalloped edges around the perimeter of the plate. Stamped on the bottom with E&R American Artware. 9 1/4" across. I believe made between late 1930s and 50s Two small chips on underside of rim. Not noticeable from the top. See last pic.