Looks to me like a B.N (Bugbee Niles) but many of their brooches were unmarked and the earrings were marked. This is a beautiful rhinestone brooch that can also be worn as a pendant as there is a hook for necklace. The metal bar that hold the pin and clasp is bent and the pin can only open so far- see pictures. Regardless it?s stunning. The red rhinestones are a mark of vintage beauty. Rhinestones are held by prongs. Rivets, open back round clear rhinestones. Measures approximately 1.25? in length.