Hierapolis, Phrygia, AE24, semi-autonomous issue. AD 193-211. 8.82 g. 

Bare head of bearded Herakles right, club over shoulder.
IERAPOLEITWN, Hygieia, standing right, feeding serpent in arms,
facing Asklepios, standing front, looking left, resting on 
serpent-entwined staff. 

BMC 50-51; SNG Munich 219; SNG von Aulock 3622; SNG Cop 430; 
SNG Righetti 1185; Hunter 1; Berlin 25; Mionnet IV, 582.
Rare.

with permission of cngcoins.com, Sept. 2011.
Estimate: $500