I was cleaning up some of the more common glass I picked up a few weeks ago when I bought a whole load locally and came across this after the dirt was gone......looks like a triangular piece of metal in the skirt and a smaller piece next to it. This toll looks to be of Brookfield manufacture. Thanks for looking. This just in....thanks to a fellow ICONer....I was made aware that this triangular piece could be a glaziers point which are used to hold window panes in place. Probably got thrown into the melting pot with a bunch of old window glass.