Antique Porcelain Shoe w/Strap, Unknown Blue mark

Hello There,
I've had this for a while, have it sitting on a pile in the living room and thought I'd post it on here to see if I could learn something more about it.
I've done a lot of looking on the net but haven't found another like it, ( not even close ), and nothing with this blue maker's mark.
It measures approximately 7" inches long, 2+3/4" inches wide.
I purchased it at the estate of actress Julie Harris in Chatham MA. She had some wonderful pieces, and a great collection of books on Emily Dickenson, of which I have one, an interesting book about a love affair.
Anyway, I thought this was just beautiful.
Any looks, loves, likes, or comments welcome.
Tonino