Marcus Aurelius, AE20 of Serdica, Thrace.

AY KAI M AYRH ANTWNEINOC, bare-headed, cuirassed bust right.
CERDWN, tall, garlanded and decorated fountain or altar.

Varbanov 1872; H&J, Serdica 12.7.46.1.
Very rare.

With permission of cngcoins.com, Nov. 2015
Estimate $200.