Aes Formatum Crescent

Aes formatum — uncoined bronze in shaped, pre-weighed lumps — preceded Rome's formal coinage system and functioned as commodity money measured by the libra. The crescent form is among the more enigmatic of the attested shapes; whether the specific geometry carried symbolic weight or simply reflected a convenient casting mold remains unresolved in the literature.

No mint authority struck these. Value was settled by the scale, not the stamp.