Trying to practice attributions.
I think this one is:
RIC IV Gordian III #68
AR Antoninianus - Gordian III - AD 240
Obverse: IMP GORDIANVS PIVS FEL AVG; Bust of Gordian III right, radiate, draped, and cuirassed.
Reverse: P M TR P II COS P P; Gordian togate, veiled, standing front, head left, sacrificing out of patera in right hand over altar, wand in left hand.
According to Roman Imperial Coinage: The FEL(IX) on the obverse celebrates the repression of an uprising in Africa in early 240, and TR P II passes on to TR P III about July 240. So this one can be narrowed down to a single year.