Mottled & Gilt French or Bohemian Cased Glass vase, ca. early 1900s

This is a nice little vase that is a cut above your typical "end-of-day" type piece. Heavy for its size of about 4.5" - it is double cased. Inner layer of yellow that glows bright orange under black light. Middle layer is mottled with red, green, yellow, and blue or black. Outer layer is crystal and is acid dipped to give it a satin finish. Flat bottom; flat cut rim, with gilding and enamels around the top. I'm open to ideas. I've considered Harrach and Legras, but can't find the shape or decor in any of the usual literature. I would also consider other French makers, such as Muller or Daum/Lorrain, who did this type of glass. The vase is unmarked. The shadow on the bottom is where sticker residue was removed.