Because they were found in one place they are not currency. Mesopotamian shell rings apparently are.
Harappa gold disks are and are not depending on your nationality not profession.
You would have every piece of hongshan currency in the world and who would buy that realy.
My very first thought were donut pi beads with a purpose such as household slave badges... your job on one side and rank if any on the other side. Board Game pieces that do not sit flat is poor design.
Edited 3 time(s). Last edit at 21-Feb-18 12:56 by Wheeler.