This Heathkit SB-1000 EXPORT Plate Transformer, is in Excellent Condition.
This Export version I believe, is made for export voltage of 100 / 200 VAC.
So if it is run on 120 VAC the voltages will be too high unless you have a variac or
a way to lower the mail voltage.
This one was installed and it was discovered it was an export transformer so it
does not have and running time.
The color coded wires are the same as the 120 VAC primary transformer.
It is designed for a single 3-500Z amplifier tube.