Huge vintage DRGM Schreiber & Hiller Art Deco channel set clear rhinestone and silver tone branch leaf flower machine age brooch (unsigned)

Wonderful large vintage Art Deco DRGM 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 stunning. It consists of an abstract stem and flower style design, very spiky and dramatic. Made by Schreiber and Hiller in Germany as we now know, these pieces are beautifully and intricately engineered.

The brooch is around 3 inches long and 1 3/4 inches wide and is here unsigned. The brooch is in very good vintage condition and fastens with a secure roll-over clasp. There are a handful of stones that in certain lights have a slight age-related grey effect, but as you can see from the pictures, this is very difficult to see and is just mentioned for completeness.