Vintage Silver Double Links Necklace

This vintage necklace features a 14" section of double link made up of 15mm rings. The approximate length of the necklace is 28" and the closure is a lobster claw. The chain tended to flatten when it was flat but has more dimension when worn. My sister-in-law was an avid collector of so many things, jewelry was just one category. She knew everything about each and every one of her pieces but unfortunately she is no longer able to tell us. I'm not an expert - I just offered to help find new homes for her beloved pieces. This is a vintage piece and has evidence of wear that is appropriate for its age. Please examine all photos closely for condition.