Septimius Severus, AE17 of Serdica, Thrace.

AV K L CEVHROC, laureate head right. 
CERDWB, eagle standing left on thunderbolt, head right, wreath in beak. 

Ruzicka 52; Varbanov 1924; Mionnet I, 366, with incorrect obv. description. 

Offered on ebay by "variana_museum", Germany, Nov. 2015.