Vintage Art Deco Crystal Ben-Amun Brooch

Good used vintage condition Light to medium wear & scratches Marked on the back in 4 places Ben Amun Pin back is in good working order Note: some of the Crystal stones throughout this brooch have faded or dull.. I believe this is an older piece. I can’t find anything like it on any of the searches I have done. if anyone can shed some light on this piece. please let me know. It appears to have some minor repair work on the back? Not sure could have been made this way from the manufacturer.