Art Deco retailer silver tone dangle earrings with clear crystals

Beautifully designed, delicate (yet still quite noticeable) "swinging" screw-back earrings.
Earrings have a single chaton set in a serrated frame at the very top, with a moving middle drop. Drop has two lined chaton rhinestones with an ornamental, open frame below.
Gently curved outward framework holds circular and most prominent lower dangle.
Pave set outer frame holds suspended, three round rhinestones in an open center, with three rectangular, narrow bars above.
Earrings are well made in a plated silver tone metal, with beaded edges and nicely faceted glass, clear rhinestones.
Both earrings weight 10.75 grams. They have a smooth underside retailer, not signed, but most probably dating from 1920's-1930's.
Earrings are in a good condition with some wear scratches on the underside.