The product is a coin from the ancient Greek city of Byzantion, minted between 387/6 and 340 BC. It is an Ar Hemidrachon or Triobol, denominated in precious metals such as silver or gold. This coin belongs to the historical period of Ancient Greece, which lasted from 450 BC to 100 AD. It is a valuable piece of history that reflects the art, culture, and politics of ancient Byzantion during this specific period.