This coin is unlisted for officina B and just sold for $228.00.
Constantius II
A.D. 350- 351
19mm 2.0gm
DN CONSTANTIVS PF AVG; pearl-diademed, draped and cuirassed bust.
VICTORIA AVGVSTORVM; Victory walking left, holding wreath in each hand.
In ex. BSIS
RIC VIII Siscia 313