Pretty sure this is what I bought at a yard sale for $2... cuz it was interesting. Has a fe chips on slightly flared rim. About 12" tall and about 9-10" in diameter. Doesn't have a knob on top, but sure it's not just a glass dome to put over something for display. Other than covering a display item, what should I do with it? Can't even consider posting a picture at this time... computer in shop and working off and OLD/SLOW Dell laptop.