I have a vintage sterling silver necklace with a large pearl. The maker’s mark on the end of the extension chain is for the company. It is also marked 925 on the clasp and has a CN. It is 16 inches long without the little extension chain. The pearl is 13mm wide. There is a little metal spool shaped bead on each side of the pearl. See my other ads for jewelry, artwork, home decor and more.