Thanks a lot Art for your detailed explanation and point of view.
This bead is 21 x 17mm. I think it is one made from a short cane and part of a serie of other interesting canes made in Murano at that time.
Likely made as experimental canes using unusual colors and often with multiple stripes.
Probably a short cane would deliver, depending on their size, two or three dozens of beads.(I speculate)
With time, who knows how many have survived.
There is a sample of this chevron in the Murano Museum and it has been catalogued by Augusto Panini in "The world in a bead".
It obviously comes from the same cane with also most of the yellow stripes missing.
JP