Vintage Charcoal Gray Moonglow Lucite Earrings Screw On 0.5" Square Thermoset

Elegant charcoal gray vintage moonglow lucite screw on earrings. Likely dating to the 1960s or so, they are 0.5" square and have a pearly sheen to the dark gray hue. CONDITION: VERY GOOD (Poor-->Fair-->Good-->Very Good-->Excellent-->Mint): I have a feeling that at some point, the backing fell off and was re-glued by a previous owner. The end result is that the backing one one earring is not completely centered. See picture. MARKINGS: None MEASUREMENTS: 0.5" square WEIGHT (w/o packaging): 0.2