Constantine II, Ticinum, AE 3. 3.41g. 320 AD.

CONSTANTINVS IVN NOB CAES, radiate head right.
DOMINORVM NOSTRORVM CAESS, Laurel wreath enclosing VOT star
V in three lines.
Mintmark PT

Ref: RIC VII, Ticinum 139. Extremely rare. Rated R5. 

Uncommon radiate bust, uncommon obverse legend. 

Contributed by Saul Roll, July 2010. 
www.romanorum.com