PD on a ring normally signifies palladium. Your ring can be palladium-plated if it's got PD written more than it. HK can be a trademark that means Harriet Kelsall. They structure and supply jewelry all over the UK and to other areas at the same time.  Region hallmarks: Some nations around https://rafaelfyqhx.aboutyoublog.com/43640136/the-definitive-guide-to-jp88