Serdica, Thrace, AE12, semi-autonomous issue.

No legend, helmeted head of Athena right, spear over shoulder.
CERDWN, winged caduceus.

Hristova 12.0.10.1 otherwise unpublished.
Very rare.

Sold by Gorny & Mosch, Oct. 2013.
Estimate: 120 Euro.