The product is a Constantine I Roman Empire BI Reduced Nummus coin certified by NGC. This coin belongs to the historical period of Ancient Rome (27 BC-476 AD) and was minted during the reign of Constantine I, from AD 307-337. The coin is made of billon, an alloy of silver and copper. It is uncleaned and carries perfect strike and surface ratings. It is a valuable piece of ancient Roman numismatics, providing insight into the era of Constantine I and the Roman Empire.