No C-Series until 1960: it's a model from the Task-Force truck line, and the short wheelbase indicates a ½-ton truck, i.e. a 31 Apache. A 1-ton model (38 Apache for the 1958 and 1959 model years) would be lot more long:

(1955 1-ton 3800 model shown, but the wheelbases stayed the same over the duration of the truck line)