Caracalla (198-217) AR Denarius (Silver, 18mm, 3.29g) Rome, 199-200.

Severus Alexander (222-235) AE Denarius (Bronze, 20mm, 3.56g) late 222,
Obv: IMP C M SEV ALEXAND AVG, Laureate draped and cuirassed bust r.
Rev: MARTI PACIFERO, Mars standing facing, head l., holding branch and sceptre.
Ref: C 173 var. (not cuirassed), BMC 68, RIC 160.

Year: 222
Diameter: 20 mm
Weight: 3.56 g
Material: Billon