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

Wonderful 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 design before and it is adorable. It consists a central floral arrangement of rhinestones with a pretty engraved back, then petals made from the channel set panels.

The brooch is around 1 1/4 inches in diameter. It is in very good vintage condition 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/