If it’s an upper case “L” as well as a decreased circumstance “c”, it’s for Louis C Marks who designed jewelry inside the 40s. SETA is an organization that provides vogue jewellery. Their jewellery commonly provides a CZ plating over silver. CN means that the jewellery is manufactured in China, https://codyodrep.anchor-blog.com/17297908/not-known-factual-statements-about-jp88