Byzantine Weights, Circa 5th-7th centuries. Weight of 15 Nomismata (Orichalcum, 30x30 mm, 67.35 g), a uniface square coin weight with plain edges. Ṅ IE engraved in outline and inlaid in silver. Rev. Blank. Bendall 89. MAH -. Pera -. Very rare. Very fine.
Since the solidus weighed 1/72 to the Roman pound, most coin weights are divisible by three. Weights of 15 nomismata, on the other hand, are quite unusual and very rare