For sale is an ancient Roman Empire double-denarius coin featuring the image of Valerian I, ruler of the empire from 253-260 AD. This coin is made of billon, an alloy of silver and base metals, and is uncleaned. It has not been given a specific grade and is uncertified, but has been authenticated by NGC. This coin is from the Roman Imperial period, which lasted from 27 BC to 476 AD. It is an excellent piece of history and a must-have for any collector of ancient coins.