Philip I AR Antoninianus. Antioch mint, 244 AD. 

Obv: IMP M IVL PHILIPPVS AVG, radiate, draped & cuirassed bust left.
Rev: ADVENTVS AVGG, Philip riding horse left, raising hand & holding sceptre. 

RIC 81, RSC 4.

With permission of Helios Auction 5, June 2010, lot 386.
Added in Aug. 2011.