Here is a picture of Venetian beads from the late 1800's to early 1900's. This pattern goes by various names - "Zen" or "Number 6".

The workmanship on your beads appears to be different - less precision and more variation on the squiggles.

The millefiori cylinders also do not appear to be Venetian.

Where did you get these beads? I think they are reproductions, dirtied up to look older. But, I would have to inspect them in person to be sure.

Note: The bead on the top right is quite different from the Zen beads. It is broken on one end and the broken surfaces are worn smooth. I initially thought it was a molded bead, but the perforation does not go through the centerline of the bead. Any comments on this one would be welcomed!