If it’s an upper scenario “L” and a lessen situation “c”, it’s for Louis C Marks who intended jewelry in the 40s. Having said that, this interpretation is less likely, as “JP” by itself doesn’t commonly signify a specific steel regular. CN implies that the jewellery is made in China, https://slorgacorhariini07406.uzblog.net/jp88-an-overview-50586970