Porcelain South African Dancing Girl

This porcelain doll has been in my aunt's family for generations. It was believed to have been acquired during from a boer settler in the 19th century in South Africa. After they immigrated to Canada, they attempted to have it appraised, but the appraiser mentioned she had only seen 2 previous instances of this doll: One with a brown and orange dress, and another that had been smashed and glued back together. This doll has only suffered a minor chip on the base, smaller than the crescents on a fingernail. She is painted in a forest green/white combination, with pink lace trimming the dress and pink rosettes midway through, with black Mary Jane style slippers. She is of fair skin with blonde hair. Only the front half of the doll is painted - the rear half has been left completely unfinished. The paint appears to be water-based with no finish. The manufacturer's mark is located at the center of the bottom ring of the base. They would like to know the value of this doll so that it can be insured and treasured.  The information above was provided by the owners and supplemented by the appraiser.

Close up of rubbing of manufacturer's mark:

 Thank you for your time!