Ancient Proto coin - Aes Formatum - Siglos VI-IV BC Central Italy or LaziumAes Formatum Siglos VI IV BC Central Italy or Lazium Semicircular element in the shape of a trident Material: bronze Weight: 46. 2 grams Size: 50mm The Aes Formatum are the successor of the Aes Rude (unshaped case bronze pieces) and the predecessor to the Aes Grave (heavy bronze coins). These are formed pieces of cast bronze, imitating actual objects or taking on recognizable shapes. Because the Aes Formatum system did not have a standard value, the