2001 series
The Federal Signal 2001SRN was the first model of the 2001 series. Early models had a round rear housing and are colloquially referred to as "roundbacks." Mechanically the roundbacks are no different from the squarebacks that followed.
The Federal Signal 2001SRN was the first model of the 2001 series. Early models had a round rear housing and are colloquially referred to as "roundbacks." Mechanically the roundbacks are no different from the squarebacks that followed.