Vintage 18KGP Long S-Link Chain Necklace

This vintage necklace is made of a mystery metal and plated with 18K yellow gold, and has a c clasp closure (stamped 18KGP). The chain is long, dainty, and in good condition overall with some wear on the plating around the clasp, causing some tone change. There are several similar chains listed in this closet with 18K gold plating, what differentiates this one is that it has the medium-est amount of clasp tone fade and it is 36.5" (the other 36.5" piece having a bald spot). Length: 92.5cm / 36.5" Weight: 7.71g Love the piece but not the price? Make an offer!