Glass Lamp Shade

I am just trying to find out more about this lamp shade. I am pretty certain it's part of a banquet lamp and I think handpainted, at least the flowers. It doesn't have the telltale seam of mass production. It's smooth all around except the flowers they are slightly textured. It's ruffled on one end and smooth on the other. I couldn't find anything like a signature or brand. About 11" tall and 31" around.