Constans. AV Solidus, Trier mint. AD 337-350. 22 mm, 4.47 g. 

FL IVL CONSTANS AVG, laureate, draped and cuirassed bust right.
SECVRITAS REI PVBLICAE, Securitas standing right, legs 
 crossed, resting left arm on column, right hand resting on top of head.

Mintmark TR.

RIC VIII Trier 3; Depeyrot 1/3.

With permission of Hess-Divo AG auction 324, Lot 106, Oct 2013.