Crystal Stemware

UPDATE -- Pic to far right are St. Louis Crystal (not mine; borrowed this photo) I have been trying to identify these for quite some time; someone suggested I look to compare the actual stems -- well, I honestly think these being St. Louis Crystal would be an impossible stretch, but it seems they are the only ones I can find that have the same kind of stems as mine-- where the stem meets the base; I know others have the "zipper" etching. No doubt there are companies that would have copied St. Louis Crystal. But boy, what a surprise it would be if mine were St. Louis! Any thoughts?

Original Post: Can anyone help me identify? There are no maker's marks that I can find - all "tapping" indications are that they are crystal (the crisp bell tones sound for days). I don't know much about "hand-blown", but these have slight imperfections, e.g., a random bubble here and there, and "whip" marks (for lack of knowledge in what might be the correct word) in the base of the stems. Of the set, even one stem is a different (smaller) size than the other five. Picked these up at a flea market for next to nothing. The stems are etched and may very well be "cut", as they have a "bite" when passing your fingers across them. Would appreciate any assistance, or a direction to go in, for my search! Thanks for looking, and wishing everyone a great day!