Very rare medallion.
Ex. Gitbud & Naumann Auction 15, 2014, where it was sold for 550 EUR + auction fees..
Roman Provincial
Mysia, Pergamon, Geta (209-211), Medallion
Obverse: laureate, cuirassed bust right, with Gorgon on chest
AVTOKPA KAI ΠOΠΛIOC CЄΠTI ΓЄTAC
Reverse: emperor on horseback galloping right, wielding spear at a prostrate enemy, shield beneath the horse, B NEOKOPΩΝ in exerque
ЄΠI CTP MHNOΓENOY B NEOY ΠEPΓAMHNΩN
Diameter 42 mm, weight 38.69 g