A group of objects I call "button bands" because they generally have a cufflink type button behind each of the main pendants. They are usually set up to hang straight down (although I have to tilt them to fit on the scanner :-) so I assume they are to be buttoned into the front of a shirt or jacket.

Or...you could disassemble it into a set of pendants with some spare chains. If you have any further information on these items, please let me know!