We have 2 General Radio 5 amp variacs. Nice working condition, knob has smooth operation.
One uses a 3 prong plug with grounded receptacle. The second one uses a 2 prong plug and 2 prong receptacle. The second one needs a new cord and plug.
The 2-prong unit is sold / shipped — the 3-prong unit is pending.
The 3 prong unit $45 – 2 prong unit $35.