The product is a Roman Empire Constantine I AD 307-337 AE4 (BI Nummus) posthumous issue coin authenticated by NGC as Fine (F). This bronze coin, classified as a BI Nummus, originates from the historical period of Roman Imperial rule and features the ruler Constantine I. Uncleaned and part of the Ancient era, this coin variety belongs to the AD 307-337 date range and is a valuable piece for collectors interested in Roman coins.