Vintage screw back / clip earrings (5 pairs)

Five pairs of unbranded vintage screw back / clip earrings. Pair 1 : oval screw back. No markings. Metal unknown Pair 2 : round / swirl silver tone screw back. No markings. Metal unknown. Need to be cleaned. Pair 3 : very slight purple tinted cluster crystal / stone screw back. No marking. Metal unknown. Need to be cleaned. Pair 4 : flower shaped crystal close clip. No markings. Metal unknown. All stones are intact-- earrings need to be cleaned. Pair 5 : gold tone flower pattern pear shaped clip back. No markings. Metal unknown. Need to be cleaned. Note: Most of my jewelry is pre-loved. I do not clean any jewelry before shipping as I do not want to risk destroying the item. There may be tarnish. I will note any flaws/defects. Please see all photos and feel free to ask questions.