A nice example of this issue.
Obverse: bust of the emperor wearing a laurel wreath, with drapery on his left shoulder, to the right, in the rim the legend:
IMP CAES NERVA TRAIANO AVG GER DAC P M TR P COS V P P;
Reverse: Pax standing left, holding olive branch and horn of obsequiousness, in fields S-C, surrounded by legend:
SPQR OPTIMO PRINCIPI;
Bronze, diameter 26 mm, weight 10 g.
