Very nice Republican denarius.
Coin in slab GCN graded AU58.
Obverse scratched.
Roman Republic
M. Plaetorius M.f. Cestianus (69 BC), Denarius, Rome mint
Obverse: head of Ceres right, control symbol behind
Reverse: winged caduceus
M·PLAETORI CEST·EX·S·C
Diameter 17 mm