My blacksmith friend Mark Atchsion sent me a link to the above image; I had seen this carving before, but never such a good picture of it.
It’s a misericord, from France. The only fixtures visible are the holes for a holdfast, and on the image on the web, it’s large enough so that you can see the bench hook. here’s the link.
here’s the caption they have:
Misericord. Detail: Carpenter. c.1500
France. Paris. Musée de Cluny.