I don't know what it is (maybe a mold?) but just think it's pretty cool, and has the feel of a whimsy to me, or a surrealist object. The hook has a threaded end, from which the wooden bolt screws off, though I haven't managed to remove the hook from its "bracket." I think I'd mount it to the wall as a completely useless suggestion of a hook.
11" long x 1 1/2" wide x 5 13/16" d and in good condition, nice dry wood patina, with a few nicks to the wood here and there.