Claudius II, AE18 ("Fraction"). 

Obv: DIVO CLAVDIO OPTIMO IMP, veiled, laureate head right 
Rev: REQVIES OPTIMORVM MERITORVM, emperor seated left, raising right hand, 
 holding sceptre. 
Mintmark: (dot)TS(dot)Delta(dot). 

RIC VII Thessalonica 26. Rated R5

Contributed by Dane, October, 2005.