If it’s an higher circumstance “L” and a reduce case “c”, it’s for Louis C Marks who developed jewelry within the 40s. Even so, this interpretation is more unlikely, as “JP” alone doesn’t commonly signify a certain metallic typical. Must I be anxious if my jewelry doesn’t have any marks? https://slotonline42186.boyblogguide.com/35888341/jp88-for-dummies