Geta AE21 of Gythium, Laconia. AD 193-211. 4.7 g. 

LOY CEP GETAC KAI, bare-headed, draped, cuirassed bust right.
GYQEATWN, A in upper centre, the Dioskuri standing facing each other, each holding the bridle of their horses, altar in lower centre.

SNG Hunterian 370 (this coin).

Courtesy of the Hunterian Museum in Glasgow.