Trajan Decius AE Sestertius. 

Obv: IMP C MESS Q DECIO TRAIA AVG, laureate, draped & cuirassed bust right 
Rev: PAX AVGVSTI S-C, Pax standing left, holding branch & scepter. 

RIC 107b, Cohen 95.

[imported from dirtyoldcoins.com, Sept.07]