The pattern is Crystal Roughed as seen in R. Williamson & Company Catalogue 15 from the 1908-1920's era. This shade may not be that old.
The green of this shade matches the green of Bullseye and Erin Fan Oil Lamps.
The shade is 7 inches tall, 7 1/2 inches wide and has a top opening of 2 5/8 inches while bottom ground fitter is 4 inches.
The purchaser's charges will be what the Post Office charges me only.