For as far as I can tell, there were two ways in which the Bapterosses attempted to make chevron type beads. The first is by molding different layers in different colours together. Quite a few of these examples can be seen in the museum. They are made in different colour combinations, and some in the classic red, white, blue. They come in a maximum of 6 layers. The type of molding on these appears to be done in different ways, I think it was mostly experimenting with the technique. Some appear to be made from different parts that were put together as a puzzle. Considering the fact that the museum shows both the beads, and some half-products, I am pretty sure they made these themselves.

The second way is much simpler, and the example I showed you from Bill Boss is one of those. It consists of a single colour bead (white) which has been decorated with some type of glaze to resemble a chevron pattern. In Briare, I have seen one other example of these, owned by a local woman and found on the dumpsite. That one actually has been made in a specific shape as well, with the ridges. I think this one is now showing in the museum as well. Some of the exhibits were changed, and quite a few of her beads were included.
The Bapterosses used these type of glazes to make plain beads resemble other beads (like fancy and striped drawn beads, and I am pretty sure that these chevron types were both made by the Bapterosses as well.

I believe that none of these chevron types were actually succesfull enough so that they could be sold. I believe all of the ones that are around are 'work in progress'.

I have not seen any chevron style beads come from any other Prosser beadmaker of that time.