The product is a Roman Empire Constans AD 337-350 AE4 BI Nummus coin graded by NGC. This ancient coin is from the historical period of Roman Imperial rule, specifically from the era of Constans I's reign. The coin is composed of billon and is uncleaned, providing it with a unique and authentic character. It offers a glimpse into the ancient Roman world, originating from Italy and certified by NGC for its authenticity and quality.