Greber stoneware glass cups

Set of four very beautiful turned ceramic cups with a very successful enameling in brown and blue tones. Their cylindrical ringed shape with a very slight foot just marked by a hollow circle is very modern and particularly pretty. They are stamped greber underneath, they probably date from the 50s or early 60s just before the final closure of the family factory in beauvais in 1961. They are very original for the time and seem quite rare to me, this is the first time I come across such cups stamped greber. They are in very good condition, no cracks, no chips, perhaps tiny chips but it seems to me rather that these are original marks: small lacks of enamel on the base or even a few burst bubbles in the enamel. They measure 9.8 cm in height, 7 cm in diameter.