Silvered bronze antoninianus, 22mm, 3.33gm, issued AD 282/283 Siscia mint.
Obv: IMP C M AVR CARVS PF AVG, Radiate, draped bust right.
Rev: PROVIDENTIA AVG (XXI in ex.), Providentia, draped, standing left, holding globe and sceptre, II to right.
References: Sear 12178, RIC 105.