Miriam Haskell white bakelite? carved moveable inside necklace Pat 3427961 GS635

Early 70's designer Miriam Haskell necklace, which features white Bakelite (?), hand-carved with a moving part inside, the bead size is 25.0 x 10.0mm, it is strung on gold tone chain, 18" long, with a hallmark tag attached.