The product is a Roman Empire Constantine AE3/4 (Bi NUMMUS) coin from the AD 337-340 period, issued as Caesar. It is certified by NGC and has a grade of XF. The coin features Constantine II as the ruler and has a historical period of Roman Imperial (27 BC-476 AD). The provenance of the coin includes an ownership history available. This ancient coin offers a glimpse into the turbulent era following Constantine's conversion to Christianity and the subsequent establishment of a new Roman dynasty.