Thanks for your answer,
You think really so? I have many chevron from 1600 to 1900... and I have never seen this kind of bead. It is different. I want to believe you, but I am not sure or it is very rare. it is not the same material. The glass is not the same than the other beads from 1900.
Yes, I believed it as you, a moment, because this bead is very very well made but....why it looks so different???? that is the mystery!!!
Tomorrow I will send you pics of green chevron ( 1900....) to see the difference.