If it’s an higher case “L” and also a lower circumstance “c”, it’s for Louis C Marks who created jewellery within the 40s. Having said that, this interpretation is not as likely, as “JP” alone doesn’t normally signify a specific steel standard. Trend-manufacturing.com is usually a participant from the Amazon Solutions https://linkalternatifcasper7722109.theideasblog.com/37539536/everything-about-jp88