In the forums of experts in Roman coins, there was no conclusion. Some say it was a sesterce, others a medallion of Galba, others still a medallion from the 16th century.The coin clearly circulates, and apart from the marks of presence in a bezel, there is nothing strange. The main problem in classifying seems to be the weight, of 23 grams, although there are many sesterces with this weight which is more common in medallions. It was in a 16th century medallion. Slight marks on the edge. There is the possibility that someone created just for this medallion, but there is no record in any part of any clone or similar design of the die that corresponds. And it would be very strange to have made one piece, it's because I think it's a good p.