Vintage diabolo shell in Sarreguemines earthenware? Red with white polka dots

This lovely cockerel has a nice décor of white polka dots on a red background. Probably in sarreguemines earthenware, it dates from the early 20th century - a white polka dot service on a red background exists at sarreguemines. Small parts - cockpits, knife holders, shovels, salt shakers, etc. - were rarely stamped. This diabolo model has two bowls for eggs more or less large. In good general condition, I report traces of use. Dimension: 4.5 X 5 X 5.5 cm height.