Welcome cpayne,
are the wings spearate pieces of horn applied to the "body" or were they all originally part of the same horn and bent or steamed into their present form? Horrible question, but are you sure it is horn and not plastic? There are a lot of knowledgeable people on this site than I who can tell you how to differentiate between plastic and horn.
Also are there any marks on the wooden base? Does it look as though the base is original to the figure? If so, are there any markings on the base? What material is the base? It looks like wood from the picture, but can't tell if it might be something else.
from a pure aesthetic point of view, the figure is simply beautiful! Your Mom has VERY good taste.