Marcian. AE4. Constantinople. 450-457 AD. 

Obv: DN MARCIANVS PF AVG, pearl diademed, draped, cuirassed 
bust right

Rev: Monogram (type 2A: no symbol above, S below, L shape 
on right of monogram) within wreath. 

Mintmark CON. 

RIC X 543. Rare.

With permission of Roma Numismatics, Feb, 2010