and the winner is @KennethTwith an honourable mention going to @Kerry Beal.
It is sold as an intestines cutter, specifically as a duck, goose or chicken intestine cutter, these being a prized delicacy round here. That said, I have seen one vendor illustrating its usages by including an image of eels being processed.
You can collect your prize the next time you are passing, Mr. T.