This is an enamelled ceramic eggcup registered by Lohnberg on 9th August 1954. This is two years before they produced the wonderful african chalkware under the name of Duron.
Goat eggcup by Lohnberg – Reg 874242
The site for everything to know about DURON, Paoli, Nieri and Bacci vintage african black chalkware / gypsum sculptures and figurines made in the 1950s and 1960s
1950s vintage chalkware statues 