Beautiful clip earrings with step down gold backing and dark green cabochons.

These earrings are stunning. Wonderful gold tone setting with dimensional step down sides. The green cabochon is soft-edged rectangular in shape. Marked OR but I can’t find who that is. If you know, I would love to find out the maker. The screw backs are Patent 3,175,475 for “Adjustable clip for earrings having a single tooth thread means” from 1962.