Philip II AE As. Rome mint, 247 AD. 

Obv: IMP PHILIPPVS AVG, laureate, draped & cuirassed bust right 
Rev: P M TR P IIII COS II P P, Philip II seated left, holding globe & scepter, 
 SC in ex. 

RIC 262a is a sestertius, 262b is a dupondius.

[imported from dirtyoldcoins.com, Sept.07]