I assumed they were recent W. African, but would like to know more about them as well!
I remember selling them, they were on our catalogue 1994 as #43.
they were then recently made and described as Mali terra cotta beads.
JP
They are indeed in 1980s & 1994 Picard catalogs, as "Mali clay beads", listed for $8.00 a strand on the 1987 price list.
So I guess we can assume they date from the 1980s.