Vintage DRGM Schreiber & Hiller (but unsigned) Art Deco channel set paste clear rhinestone brooch - beautiful floral design

Pretty vintage Art Deco brooch in silver tone with clear channel set rhinestones using the Schreiber and Hiller company's patented construction. I haven't seen this exact design before and it is adorable. It consists of a central rhinestone with clear rhinestones in a border around it, then layers of petals made from channel set slightly curved S-shaped panels.

The brooch is around 1 3/4 inches in diameter. It is in very good vintage condition with a tiny bit of rhinestone yellowing in some lights and fastens with a secure roll-over safety clasp and pin.

A fabulous website here is packed with information about Schreiber and Hiller pieces: https://www.trufauxjewels.com/jewelry-mystery-drgm-1138525-esha-randel/