This ad is from the Crockery and Glass Journal, May 1947, page 7. The glass was distributed by Mark E. Rosenfeld Inc. of New York, NY.
Ad states that the items are FOB from the factory in West Virginia. Packaging has been found that indicates this glass was shipped from Paden City, West Virginia; it was distributed under the name of Dorset Provincial Crystal.
Thanks also to Kathleen Ervin for the previous Gallery version of this ad.