A large and heavy hanging shade. 18" diameter and 8" height, weight 11 lbs. Embossed in the inside: "Made Under Ainsworth Pat. No's U.S. No. 1957192, Canadian No. 348747, Phoenix Glass Co." The patent is here: http://chataboutdg.com/gallery/details.php?image_id=11938 Ainsworth Patent for Shade.
It a Custard color & almost impossible to photograph to get the detail of raised Maple leaves. Probably from a bank.