Three sizes of type B snake beads with their side view.
Beads do interlock only if they are strung on the same side.
Size : 4.5mm, 6mm and 7.5mm. All have 4 points and are made by the Prosser method.
These type of beads are on a Risler sample card as Serie 5038 and 5002 in 5 and 7mm.
Also seen on the Redlhammer card #106 as article #3049 in the three sizes and in 13 different colors pictured in Beads from Gablonz.