The closure is an antique copper button that I bought on eBay that has a fox's head on it. Those types of buttons were made for hunting jackets, hunting being an activity of which I strongly disapprove. But I buy them because I like the foxes so much.
I found it difficult to actually use the button when I made this piece (rather than keep it in my collection). And now I've found it even more difficult to list the piece. But of course listing it doesn't mean it will sell. And if it does, hopefully the new owner will appreciate it.