Constantine I, AR siliqua, 20mm, 335-336 AD, Thessalonica. 

No legend, rosette-diademed head right.
CONSTANTINVS AVG, Victory advancing left, holding wreath and
palm branch.
Mintmark TS Epsilon.

RIC VII Thessalonica 214.

Rare.

Contributed by Dr. Hubert Lanz, auction November 2000, 
Added July 2011.