Very rare glass vase covered with metal oxides giving an iridescence signed Pantin

Very rare glass vase covered with metal oxides giving an iridescence signed pantin probably late 19th century. Extremely rare model can be a study not or little commercialized because this technique was not widespread at the time. Beautiful mix of color and very design. In good condition except a small glow at the collar (see photo) Height 20cm diameter 11cm.