Marcian, AE4, Antioch. AD 450-457, 

DN MARCIANVS PF AVG, pearl diademed, draped, cuirassed bust right.
Monogram 10 in wreath, (reversed Z).

Mintmark ANTA.

RIC 569.

With permission of Leu Numismatik AG Web Auction 10, Lot 1767, dec. 2019.