Hello. The SC mark on the reverse of this ancient coin proves that it's Roman. It might be provincial, probably from Antioch, or early " basic " Roman. It weighs 12.36 g. I don't think the face of the Emperor on obverse is very difficult to guess. I personally tend to guess it's Nerva with this long neck. But still it's just a guess.. Please assist me to find out the ID of this coin, including the denomination. Thanks..