Karu 1940's Silver Filigree Door Knocker CLIP Earrings

1940's Karu Silver Plate CLIP On Earrings Unique Clip with Patent No. 19679865 The Patent was granted in 1934. The Singular Karu Signature was used through 1950 Etched Layered Door Knocker Style Filigree Back Layer 1 1/8" H Excellent Vintage Condition New York City based costume jewelry manufacturer Karu was the successful collaboration of Paul Kaufman and Jack Ruderman, which began in the 1940’s. Jewelry was produced until the 1970's under other marks including, Karu Arke, Inc, Karu Fifth Avenue, Karu Sterling and Karu Arke made in W. Germany.