PD on a ring ordinarily signifies palladium. Your ring could possibly be palladium-plated if it's PD created over it. HK is really a trademark that means Harriet Kelsall. They structure and provide jewelry all over the UK also to other spots too.  Can “JP” also stand for a different region? https://cashvelub.blogerus.com/58902293/detailed-notes-on-jp88