Severus Alexander, AE27 pentassarion of Kallatis, Thrace.

AVT K M AVR CECH ALENAXDROC, laureate head right.
KALLATIANWN, Kybele seated left, holding patera and resting hand
on drum, two lions at her sides. E in right field.

Varbanov 340 (this coin).

Courtesy of Numismatik Lanz, Added Feb. 2011