Constantius II, AR Siliqua. Siscia. AD 337-340. 

CONSTANTIVS PF AVG, laurel and rosette-diademed, draped and 
cuirassed bust right.
CONSTANTIVS AVG, three laurel branches, star above.

Mintmark SIS dot.

RIC VIII Siscia 64; Sear 17891.
Rated R3.

With permission of Roma Numismatics, auction XIX, lot 956, April 2020.