Have this very heavy 4 1/2 pound dish. No marks, there are air bubbles, what appear to be glass fragments inbedded in the dish. Note the dark spot on the bottom view near the top, that is in the glass. Any help identifying maker and age is greatly appreciated. [img size=480]https://kovels.com/media/kunena/attachments/legacy/images/GEDC1431.JPG[/img]