I am original owner. Bought new in 1947. Used very little because I was going to College on WW2 GI bill, then recalled for the Korean War. Again, more college on Korean GI bill. Then, as I moved around country, Father, then Brother, then Sister kept for me. My brother removed the huge,  heavy, transformers power supply and rack so that it would be lighter to transport for Father, then him, then Sister. It worked great then, and still works now. I hooked it up few days ago and got a nice r.f..burn with the 40 meter coils in. Took coils out with intention of trying other bands, but decided to give this Millen up because now have an Orion2.
I hooked up at lower plate voltage. It put out 23 watts into dummy load with 425vdc and 105 ma input. The rust spots are purely cosmetic.
My call, then and now, W9ECJ.