*It appears that it could be used to measure coins, but old Roman coins in that time period were not very round. They were hammered on a die, not cast, so they

*It appears that it could be used to measure coins, but old Roman coins in that time period were not very round. They were hammered on a die, not cast, so they weren’t a perfect circle. Weight and material constitution was more important to the value of an ancient coin, not a perfectly round shape (especially since the coins were debased of their silver so much during the 3rd century). In addition, some dods had triangular and oval holes. The Roman-Gallo dodecahedron was created for the Roman troop arms merchants (Negotiatores) & Auxiliary troop arms officers. It was used to measure, procure & maintain the Roman Auxiliary troop polearm weapon shafts; to ensure standardized specs for the varying Auxiliary troops (they were allowed to use their own weapons which varied by troop origin). This would include the diameter - mid shaft, the taper of the shaft just outside/away from the joint at the weapon head socket & the taper of the wood shaft, just inside the head socket. Seach Quora under my name (Richard Allday) for more info. https://www.quora.com/What-was-the-use-of-the-Roman-dodecahedron-an-unsolved-mystery-since-1739/answer/Richard-Allday-1 https://www.quora.com/What-was-the-use-of-the-Roman-dodecahe...