[September 2021] The item came up for auction on eBay, hence the colour images.
A great example of a Duron lady bust, often described as an african lady made of chalkware. The original registered design from 5th February 1959 is all black, but the final pieces may have the hair braiding and the necklace painted white.
I have include below an image taken from the Worthpoint website. It incorrectly lists a wall plaque having these registration and product numbers. Maybe it was stamped in error?? It does, however, give an idea of how it could be painted.