Marcian, AE4, Nicomedia, 450-457 AD. 11mm, 0.83 g.

DN MARCIANVS PF AVG, pearl diademed, draped, cuirassed bust right.
Monogram type 4 within wreath, no symbol above. 

Mintmark NICO

RIC X 558
Rare.

With permission of Numismatik Naumann, March 2016.
Estimate 50 Euros.