Roman stamp used to mint Roman coins. This is an extremely rare artifact of this type that has survived to this day. The object was discovered in Lugdunum (now Lyon, France), on the site of a former mint. Dated to 14-37 CE.
The stamp was preserved along with the stuck silver denarius of Tiberius, still stuck in it. Official coin stamps were strictly protected to prevent counterfeits and were destroyed at the end of their life.
As can be concluded from the traces of the gouges, a mint employee tried to knock the denar out of the stamp, but ultimately failed and threw the stamp away.