Caracalla and Geta, AE27 of Hadrianopolis, Thrace.

AV M AV ANTWNINOC GETA KAICAR, laureate, draped, cuirassed 
bust of Caracalla right, facing bare-headed, draped bust of 
Geta left.
HGE CIK KLAROV ADRIANOPOLITWN, Hermes standing left,
holding purse and caduceus, ram at his feet.

Varbanov 3653 (this coin).
Extremely rare.