They are sometimes called Chinese Millefiore or Dragon Eye Beads. The way yours are mounted is unusual. I believe the one you posted is from the 1920's because the squiggles form a rectangle and the eye is neatly centered.

On occasion, but rarely, I have seen other beads mounted in this manner and used as watch fobs. But, to me, this beads seems too bright to have been used this way.

~Linda, I am sending you a private message. Please look for it.

Just Fred

These look like Minority trade, trade beads. These are probably very old but not ancient. The air bubbles are a sign of age. Made in China.
They have the classic starburst pattern is typical of these beads. It's very early here so I cant get you the dates right now.
Hope this helps. I have a strand of these for sale on my Ebay store right now. You can go to Anthropoasis on Ebay and see some just like them.
I hope this helps.

Thank you for the picture, Odan. Lovely beads!
Beadiste, are you basing your comment on surface? color? density? the rectangular trailed frame?
Any guess as to use?
Cheers!
LD