Exquisite art deco lacquer and eggshell clock

Circa 1920 art deco exquisite and hard to find clock.
Silver and nickel plated metal. Black Lacquer. Eggshell inlaid.
Marcasite stones. Dial is stone made (Possibly Jade) with marcassite digits.
French. Works few minutes and stops. Probably need cleaning but seems that nothing broken inside.
Rare find.
h.11.5cm l.5.5cm L.9.5cm
REFERENCE: cl2211