Valentinian I AE4. 

Obv: DN VALENTINI-ANVS PF AVG, pearl diademed, draped, cuirassed bust right 
Rev: SECVRITAS-REIPVBLICAE, Victory advancing left holding wreath and palm 
 branch. 
Mintmark: GSISC [symbol #1] (a reversed Z); left field: D over P 
 (unlisted for Valentinian); right field: F. 

RIC IX Siscia 15a, type xliii unlisted var (D over P listed only for Valens), possibly rare.

Contributed by Dane for George Clegg (biggyg2), August, 2006.