Vintage Silver Tie Lapel Clip with Pearl Daimaru Japan

Vintage pre-owned appear never used, very good condition. c 1980 Roughly 2" x 1/4", pearl is about 6mm (just under 1/4") diameter. Clip has an etched line detail and interesting textured rectangle under the pearl. Marked Silver 850 and a patent number for the clip design. Original jeweler presentation gift box included, labeled Daimaru, Lion Star.