Caracalla AE27 of Plotinopolis. 

(from top right) AYT K M AYR CE ANTWNEINOC, laureate, draped 
and cuirassed bust left, holding spear and shield.
PLWTEINOPOLEITWN, Apollo standing front, looking left, 
holding plectrum and lyre set on a column or tree trunk. 

Varbanov 1844 (this coin illustr.)