Severus II, AR Argenteus, Serdica. AD 305-306. 3.32 g.

SEVERV-S NOB C, laureate head right.
VIRTVS MILITVM, campgate with seven layers, three turrets, 
no door. 

Mintmark dot SM dot SD A dot.
RIC VI Serdica 11a-b var (emperor); Sear 14627.

with permission of Auktionshaus H. D. Rauch GmbH, Dec. 2015.
Ex Gemini VII (2011), 841.