French Mystery Clock of Woman Figure circa 1870

This is a beautiful mystery clock made in France around 1870. Typically, a mystery clock functions as a clock but the mechanism is hidden or obscured in some way. Here the sort of mystery clock I am talking about.
I am not sure what particular mystery this one performs. I'd love to know -- especially with an estimated value of roughly $5,000 to $10,000. This clock is a double-mystery, I suppose. They mystery of the mystery.

Here is the eBay listing for this French Mystery Clock to be auctioned on May 11th, 2008.