Caracalla, AE23 of Serdica, Thrace. AD 198-217. 7.75 g.

AVT K M AVP CEV ANTWNEINOC, radiate head right.
OVLPIAC CERDIKHC, Hermes standing left, holding purse and caduceus.

Unpublished bust type for this reverse. Ruzicka 221 var 
(bust type); Varbanov 2360 var (ditto)

With permission of cngcoins.com, Feb. 2015.