Plique-a-jour wisteria brooch, attrib. vever

18k yg. articulated brooch with plique-à-jour enamel foliage and dogtooth pearl wisteria blossoms, ca. 1900. Attrib. to Vever, possibly after a design by Rene Lalique. French eagle mark for 18k, no maker mark evident. 5 1/4" x 3". 24 dwt. Note: Collection of Dora Jane Janson. Reference: Comb and brooch by Rene Lalique. Bartan, Sigrid. Rene Lalique. Collection of Museum of Applied Art, Vienna, cat. #68A. Provenance: From the Collection of Dora Jane Janson. Literature: Janson, Dora Jane. From Slave to Siren. The Duke University Museum of Art. 1971. Cat. #134.