Vintage black turquoise crystal mid century earrings screw back

Fantastic beautiful mid century design screw back earrings. Amazing intricate detail, glowing turquoise set into black lucite accented with Austrian crystals. Screw backs, there might be a signature on the screw back but too tiny for me to make out. Earrings measure.75” in diameter. No flaws, sparkling faceted crystals. Please see all photos for full description.