What does the bottom look like? What is that part made of?
i believe it is a pestle.
That's one of my guesses, too. I'm also thinking about a handle from some kind of tool. That's why I'd like to know what the bottom layer is.
OK, I've added a couple more views. The white trim is a tightly bound heavy twine, held in place with a rubbery glue substance. And the bottom shows up in the final pic above.I bet you both are right about the pestle, but I'm also going to e-mail the pics to friends with a boat to see if it is any kind of marina tool...Thanks for helping to figure this out!
Nope, not a marina tool.
Now I think it's a stopper of some kind, which was one of the things I thought about yesterday and included in an Internet search.These views make it more interesting, because I wouldn't have guessed the narrowed shape.Marine is a good idea. I also emailed a bunch of interesting people yesterday, but nothing yet.
Our Honorary Researcher in action! She'll crack this case yet!