Septimius Severus, AE39 of Herakleia-Pontika, Bithynia.

Laureate, draped and cuirassed bust right.
Unclear legend, Herakles standing right, wielding club,
grasping the reins of a rearing mare of Diomedes 
facing him, another mare on the ground below.
Unpublished reverse for Septimius Severus.
Lanz 120, 393.

With permission of Numismatik Lanz München, May 2004.
Note: The original sales documentation described this coin
as having been struck in Alinda, Caria. However, this image, 
of Herakles and the horse facing each other, is known only from 
Herakleia-Pontika.
Another was previously sold by Numismatik Lanz in auction 102, Lot 706 (May 2001). That coin has a circular countermark on the 
reverse: retrograde 6-Assaria mark = Howgego 809, known for 
Herakleia-Pontika.