It was probably made by Jacques Gruber (unsigned), one of the greatest master glassmakers of the early 20th century.
Jacques Gruber (1870-1936) is one of the founders of the Nancy school. He gave French stained glass its letters of nobility, notably by daring to superimpose acid-etched glass, thus giving depth and great readability to the motifs.
Colored cathedral glass, painted with grisaille and cabochons assembled with lead. The wooden frame is original.