See the photos of this very nice necklace worn or sold by a tribesman during the North African campaign in WW2.  The black cord is at least 25 inches and contains two US Walking Liberty silver half dollars dated 1941 and 1944.  There are also 16 vintage African trade beads.  Not a put together piece and all original.   A really showy piece that would greatly aid your display.

Tracked shipping, handling, and insurance in the US is $7.00.