This is the second newer model which is less common,the PC is moved forward and the ballast is mounted inside the housing instead of the bottom door.
Manufacture date: Early 70's
Made in: Canada
Voltage: 120V
Thanks Joe! Yes the Douglas Power-Paks had riveted aluminum,these older ones had pounded rivets and the later ones had pop-rivets,the only part that is cast aluminum on these is the part that mounts to the pole.