Unsigned brooch is a CLAUDETTE design, with openwork construction, blue "catseye" art glass cabs, various shades of blue and aurora borealis rhinestone chatons, and characteristic heavy japanned setting. Cabs are very clear -- free of some of the cloudiness that one often sees with these Claudette pieces. 2" diameter. Excellent condition. This same brooch is identified in the reference book Inside the Jewelry Box, Vol. 3 (Ann Pitman).