Constans. AE. Trier. 348-350 AD. 

DN CONSTA-NS PF AVG, pearl diademed, draped, cuirassed bust right

FEL dot TEMP dot REPARATIO, radiate phoenix standing right 
on globe, which is marked with lines of latitude and 
longitude. 

Mintmark TRS. 

RIC VIII Trier 232. Rare.

Courtesy of Roma Numismatics, Feb, 2010