2001
The Federal Signal 2001-SRN 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 2001-SRN 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.