If it’s an upper case “L” as well as a decrease circumstance “c”, it’s for Louis C Marks who built jewelry within the 40s. Even so, this interpretation is less likely, as “JP” alone doesn’t generally signify a particular metal conventional. CN ensures that the jewellery is manufactured in China, https://emilianoqftfs.laowaiblog.com/35862690/considerations-to-know-about-jp88