Grandmother's stemware

I have two of these cystal champagne glasses fom my grandmther's estate. Each are 5 1/2 ''' tall, holllow zipper cut stem. My grandparents were married in Chicago in 1937. Several wine glasses and water goblets were of the same pattern. Sadly, those were heavily used and chipped beyond repair.
They are quite delicate and an intricate needle etched pattern adorns.
Any help is greatly appreciated..

Sinerely,
Theresa