Constantine I, AE follis, AD 337-340.

obv. (no legend) veiled head right.
rev. DV CONSTANTI-NVS PT AVGG, Constantine veiled, driving
galloping  quadriga right, the hand of god reaching down to 
him.
Mintmark SMAL delta.

RIC VII Alexandria 12; Cohen 760

With permission of Numismatik Lanz, auction 97.