Antique Art Nouveau Brass Numbered Citrine Amber Rhinestone Sash Brooch

Extremely nice! Polished thoroughly & ready for immediate use. Larger brooch at 2 5/8” long & 1 3/8” wide. No maker’s mark except for the numbers 7018 impressed on the underside…..so maybe this is Sphinx or Boucher??? I am not extremely familiar with antique jewelry so I honestly cannot say……please see all photos as they provide a more accurate description than my words. This is an excellent piece for a collector.