Hi, I have this Roman coin.
It seems its made out of bronze, as it has small green spots of oxidation. ( It looks like someone has painted a reddish color on top of the areas that started to fade, such a shame)
Weights 11g
23mm in Diameter
Obverse lettering : “ DIVA FAVSTINA”
Reverse Lettering: “ CERES S C ”
Obverse : Faustina the Elder looking right with pearls on top off her folded hair

Reverse: Ceres, standing left, holding corn-ears and a torch

Please help me identify which coin and date this must be. I cant find exactly this coin on Numista.
Thank you