Hi Alan, hello to all participants,
a wonderful and unusual example; the connection with Belgium is rather convincing, I wonder if the material is really metal or plaster of Paris with surface Treatment that Looks like metal (would the glass stand the different contraction index of metal?)
I have not found any real Person that could fit, I am sure it is not the Empress Maria Theresia, she was only shown veiled after death of her husband, Franz Stefan von Lothringen, and any use for depicting had to follow a strict Codex how and what- the way around was to use Portraits taken from coins or medals...
so my best guess - and that's consistent with Belgium and the hair deco and jewellery- would be the
mythological (Bible) Queen of Saba... other guess is "Lady Fortune"- but where are her fitting attributes- wheel, 4 leaf clover...?
There are other biblical themes shown in Belgian weights, such as Saints and related...
Other arguments: the "crown" has ornaments from the "second Rococo"- Shells, Rocailles, twisted ribbons- and those are later reworked for Art Deco (Jugendstil)-
the earrings and the Collier are clearly "middle East" or "Egypt" influenced- there was a rising interest in Egyptian and biblical history, beginning with Napoleons campaign there and finding a summit a bit later with finding Tut Ankh Amuns mask and grave...
So my vote: Queen of Saba,
Kind regards Erhard