Due to severe corrosion or grime, the front of the coin is difficult to recognize. On the back, I can see the figure of a person holding something in both hands.
1. Can I see this as Gallienus coin?
2. I am curious whether the layer covering this coin is a bronze corrosion layer or dirt. If it is dirt, it might be possible to remove some of it.
Attached is the picture of coin that I referred to.
