Hello Chuck,
I have restored one of these in the past, The primary is around 1100 ohms and the secondary is around 500 ohms. I replaced two of them in the same radio, worked great.
Go to this site, use the four wire transformers, $19.00?
http://www.arbeiii.com/transformer.htm
Mitch
In order to be sure of the primary and secondary connections i measured the coil resistances of the good existing transformers. This will indicate where the primary and secondary coil connections should be.
They are all the same in orientation.
Mitch