Constantine I, AE3, 337-340 AD. 

Obv: DIV CONSTANTI-NVS PT AVGG, veiled head right 
Rev: no legend, emperor driving quadriga right, the hand of God above; 
Mintmark: TRP

RIC VIII Trier 68
rated rare

With permission of Heidelberger Münzhandlung Herbert Grün, May 2011.