Searching for this patent pulls up several large link necklaces but I could not find this exact one. It’s in good condition and kept in a clean smoke free home. Vintage Napier (1950’s) Chunky Gold Tone Link Chain with rib design Necklace 19” Pat 4.774.743 Description: This is a vintage Napier necklace from the 1950s, 19”, each link is approximate 1” round-21 total links, and it has the ribbed groove etched design for that extra more expensive appearance. #vintage #vintagejewelry #napier