Seller CNG ebay, May, 2000

Moesia Inferior, Marcianopolis. Diadumenian, as Caesar.  217-218 AD. Æ 20mm (5.17 gm). 

Bare head right 
Kybele seated left, holding patera and resting elbow on smallshield; lion standing left below chair. 

Moushmov 595; Pick AMNG 792.