GE Proline Step Down Autotransformer 60hz Ballast GETR480/277-250W
GE Proline Step Down Autotransformer 60hz Ballast GETR480/277-250W
GE Proline Step Down Autotransformer 60hz Ballast GETR480/277-250W
Vintage Unknown Pole Vibrator Variac Tool Equipment
I have no clue what this thing was made for. Price reflects the unknown use of this item.