If it’s an higher situation “L” along with a lessen situation “c”, it’s for Louis C Marks who designed jewellery within the 40s. Having said that, this interpretation is more unlikely, as “JP” alone doesn’t usually signify a certain metallic normal. CN means that the jewelry is made in China, https://casper7744544.blog2learn.com/84533594/how-jp88-can-save-you-time-stress-and-money