Marais sandstone egg cup

Charming egg cup stamped underneath “grès du marais france” with light ringed reliefs and pretty beige and caramel colors. It dates from the end of the 60s or 70s, the brand having been registered in 1965 by claude sechoy. It is in perfect condition, the small defect on the edge which seems to be a chip, is not one, it is an original defect because under the enameled cover. It measures 7.5 cm in height, approximately 5.5 cm in diameter, 4.5 cm in internal diameter at the edge of the egg cup.