Dormeuse Earings hallmark or maker, what year ?

by Jo torello
(new york)

What is the item? dormeuse earrings

Can you please provide all background information?

pink green and yellow coloured gold with pearl set in centre


What are the markings?

horse head hallmark with capital letter M on horses lower cheek, then B F with a mathmatical compass between these two letters in a diamond shape lozenge. Stamped near the hinge on ear wires that are front closing.


Where are the markings?