Beautiful old strand of black and white trade beads, these are solid black beads with very fine white stripes.  We bought these in the 1980's as part of a collection of antique beads, we have 5 strands these left.

Beads are approx. 1/8" in diameter and cover 20" of strand.  They are strung in the traditionally manner on raffia fiber with an overall length of 23".