First one is picture of reworked chevron beads. One is a piece of a 7 layer chevron, now made into a small cilinder bead. The other one has been twisted, probably in Ghana.

Second picture shows a pseudo chevron. It looks like some type of ceramic to me. Does not look like Prosser. The decoration appears to have been made with a stencil or a stamp, so not like some of the ones that look like they were done more freehand. The seller thought it might have been made in Nigeria or Ivory Coast. Any thoughts?