Art deco porcelain and opaline sconce

Very beautiful sconce of the 1920s consisting of a porcelain collar and a tulip with pans in real white opaline. Original brass bayonet sleeve, changed electrical wire. Wall attachment by a hook. Note that a small "pellicule" of glass has detached from the edge of the opaline (see photo). It's very discreet but I prefer to point it out. Height 20 cm; 20 cm length; 10 cm in diameter.