15 x twist beads in Brown/White (1950-60s) 6x5mm

This is a pack of 15 vintage- Brown / White glass beads with raised ridges which twist around the beads. They were made in the 1950-60s in a factory in Germany which recently closed. The beads are approximately 6mm in length and 5mm in diameter and some of the beads have a hint of blue in them.