JP on a ring is a hallmark and this stamp is used by a famous jewellery firm named Jack Pilatowicz. Jack Started his company in 2007 in Brisbane, Australia, after twenty years of expertise in the jewellery manufacturing field. Hence, if a ring has N 925 Cn stamped on it, https://lanerepqe.ttblogs.com/16578583/the-smart-trick-of-jp88-that-nobody-is-discussing