Huge Six Layer Chevron African Trade Beads 1 1/2”

Picked these beads up at a thrift store today. Three in total 1 1/2” Chevron trade beads. They appear to have six layers. Definitely some of the largest beads I’ve seen in person. I have no clue to there age, whether there antique or modern. They look like they have some age to them. Hefty in weight the lightest bead is 29 grams, while the heavier ones are 33 and 34 grams.