JP on a hoop is a trademark and this stamp is employed by a renowned jewelry company named Jack Pilatowicz. Jack Launched his business in 2007 in Brisbane, Australia, soon after twenty years of experience from the jewellery producing field. HK is usually a trademark that stands for Harriet Kelsall. https://trentonlzoco.blogsvila.com/37036692/5-simple-statements-about-jp88-explained