Vintage Modernist copper necklace by Francisco/Frank Rebajes well known Rebajes company (New York 1932-1960). Abstract shape and hammered look (signed on verso and on matching chain's clasp - name Rebaje and modified "S" in the form of a sideways "8) "This design is called "Double Oval and Wave" and can be seen on page 64 of the book Copper Art Jewelry. It has a pin mechanism on the back and also has a ring which can be used for a pendant. A truly unique piece. " -(Ref: Aunt Freddy's Vintage Jewels on Ruby Lane)