Delft ceramics

A friend, the artistic and knowledgeable cassfoto, is helping me dispose of a small cache of inherited costume jewellery.

We are using online sites and have had moderate success to date

This Delft brooch comes from The Verwoerd Ceramics Studio (1949 - 1976)

It is described as a Zenith model 866 flower basket brooch by HC de Jong, a decorator for Verwoerd
Hendrikus Cornelis (Driek) de Jong (Gouda 1907-1972)

Unfortunately the pin at the back is missing and will no doubt affect the value, but has nice clear marks on the back.