A couple of weeks after I had some luck with these [id=543631410], I went into another antiques mall that I hadn't visited for a while only moments after a walk-in had sold them a box of insulators with this sitting on top. They were more than happy to make a quick sale of the whole box for a tidy profit, and I was more than happy to take it off their hands so they didn't have to move it again. 8^D I know nothing of the history as to where this piece was used or when, but it is for sale here [id=545425274].