drdawg said:I wonder if this is an old-timey medicine ball of some sort? Medicine ball is probably not the right term, since all those that I know of were made of leather. Perhaps exercise ball is a better term.
Weedwhacker said:I've been trying to picture a possible use for it if it was meant to be put on top of a post that fit into the hole, but not coming up with any ideas that way eitherI agree with this as a possibility. If there were chains attached to the rings the ball portion could be placed on top of a post; then moved on or off and the chains would prevent it from escaping.