Those look to me like a reproduction of a type of bead that was
popular as a trade item with American Indians during the late 1700's
through the 1800's. They're often referred to as "wound glass,"
describing the way in which they were made by winding around a
mandrel. The original beads were, I think, mostly made in France and
Italy; the modern versions are usually Indian.
I have a few large (over 1/2") donut beads in beautiful cobalt blue,
probaby French, from the late 1800's. They're easy to come by and not
"The History of Beads," by Lois Sherr Dubin, would have a much more
detailed (and probably more accurate) overview of these beads, if you
wish to delve further.
All the best,
(in Cincy, where Nature is waking, but has not yet had her coffee)