Constantius Gallus AE3 of Siscia. 19mm (2.23 g).

DN CONSTANTIVS IVN NOB C, bare-headed, draped, cuirassed bust right.
FEL TEMP-REPARATIO, soldier standing left, spearing 
fallen horseman who is wearing a Phrygian helmet
and reaching backwards.

Mintmark ASIS.
RIC VIII Siscia 351.
Rated C3.

From cngcoins.com on-site auction 55, closed December 18, 2002.

Used by permission of CNG.