Septimius Severus, AE19 of Serdica, Thrace, AD 193-211. 3.84 g. 

AY K L C (or CEP) CEYHROC, laureate head right. 
OYLPIAC CERDIKHC, garlanded altar surmounted by coiled serpent, head left. 

Varbanov 1973 (or 1975 depending on obv. legend, unclear on this coin); Moushmov Serdica 56.

Offered by highrating_lowprice on ebay, Jan, 2019.
(If anyone has a clear example, feel free to send it).

_serdica_Varbanov_1973