PD on a hoop normally represents palladium. Your ring could possibly be palladium-plated if it's got PD composed around it. HK can be a trademark that means Harriet Kelsall. They style and provide jewellery all over the United kingdom also to other locations at the same time.  State hallmarks: Some countries https://augustpcnzj.theideasblog.com/37601163/a-simple-key-for-jp88-unveiled