Vintage Dark Abalone Earrings

These vintage earrings are made of a gold tone metal and have clip on backings. The earrings each have a round abalone oval that has beautiful colours within it, as well as 2 gold tone round swoops at the bottom. The back is stamped with a maker's mark I can't identify. From some angles it looks like "OK", from others it looks like a stick figure with a big head. Regardless, these earrings are in great shape and are one of my favourite pairs. Dimensions: 26mm x 14mm Weight: 6.56g