Constantius I. Chlorus 293-306 as Augustus. 1/4 Follis (2,41g), Siscia 305-306 AD. 

Obv.: CONSTANTIVS AVG, laureate head right.
Rev.: GENIO POP-VLI ROMANI, Genius standing left, holding patera and
cornucopiae

Mintmark SIS.

RIC VI Siscia 169a

H. D. Rauch GmbH Summer Auction 2010, 13 September 2010, lot 1379.
Sold for 24 Euro (approx. $31)