Constans, AE4. 16 mm. Rome. AD 337-340.

DN FL CONS-TANS AVG, laurel and rosette-diademed, draped, cuirassed bust right.
SECVRI-TAS REIP, Securitas standing facing, looking right, left 
elbow leaning on column, legs crossed, holding sceptre.

Mintmark R leaf T.

RIC VIII Rome 11; LRBC 588.
Rated common.

With permission of Dirty Old Coins, October 2005.
Attribution corrected.