Severus Alexander, AE27, of Kallatis, Thrace.

AVT K M AVR CEVH ALEXANDROC, laureate head right.
KALLATIANWN, Tyche standing left, holding rudder and
cornucopiae.

Varbanov 348 (this coin); Moushmov 314.

Courtesy of O. Gavrailov Collection, Sept. 2011.