Gratian AE3. 

Obv: D N GRATIANVS P F AVG, pearl-diademed, draped and cuirassed bust right 
Rev: GLORIA RO-MANORVM, emperor advancing right holding
 labarum and dragging captive; wreath in right field. 
Mintmark: TES Gamma

RIC IX Thessalonica unlisted mintmark, unlisted fieldmark.

Note: The series with TES + officina letter in the exergue
(RIC IX 16) is listed only for Valentinian II and Valens.
This example is clearly a coin of Gratian.
In addition, the wreath in the right field is unlisted
in RIC.

Contributed by Dane, October, 2005.