From Christies June 1990 auction.

The bell shaped shade with green and white mottled leaves, tag stamped TIFFANY STUDIOS NEW YORK, the ribbed cushion base patinated green, the base stamped TIFFANY STUDIOS NEW YORK 28673, and with the Tiffany Glass and Decorating Company monogram. 20" high, 15" diameter of the shade.

©1990, Christie's New York, all rights reserved.