Diadumenian, Caesar AD 218 AE 27 struck under the magistrate Statius 
 Longinus

obv. KM OPPEL ANTWN DIADOYMENIANOC, bust draped, bareheaded, r.
rev. [YP CTATIOY] LONGI - NOY NIKOPOLITWN / PROC IC, Artemis as 
 huntress advancing r., holding bow and extracting arrow from
 quiver on back. Her accompanying dog running at her feet.

AMNG 1844 (Gotha) (attribution by Curtis Clay!)

about VF+, glossy mid-dark green patina, strong bust of Diadumenian