I started collecting these silly shot concentrators several years ago. Eley and Joyce argued over who rightfully developed and patented these wire basket concentrators back in 1828. It took a while before they were accepted by shooters due to problems of inconsistent opening. Bone dust was settled on and seemed to do the job. Although I can’t tell for sure but yours seems to be a green long distant variety. They made several other colors and types including for breech loading guns (without the wire). They come with various shot sizes and gauges from 36 to 2 with all sizes in between. They also vary in length with different amount of shot. They were even used in the Civil War and by stage coach guards.
I published a book years ago on Early Shot Concentrators and Spreaders. I still have many copies available if interested, send a private message. There are a lot of different kinds of concentrators, from springs, thread wound cylinders, and sliding cups, most were short lived but the Eley concentrators saw the greatest acceptance. The advent and acceptance of choke boring brought on their decline.