Emile Gallé - Art Nouveau Mushroom lamp with virgin vine motif

Nice art nouveau lamp by the establishments Emile Gallé, 
in multi-layer glass engraved with acid of a decoration of virgin vine.
Clear background, beautiful even when not lit.
Signed in relief on the foot and on the cap.
Good condition, electric system renovated.
Early 20th century.
Original mounting in bronze.
Diameter of the hat: 17.5 cm