[Milsurplus] BC-221-J vs BC-221-T or what?

[Don Merz]

I guess the time has come for me to keep one of these in the shack. I have had literally dozens of them go through my hands over the years. Now I have two here and one of them is going to stay. But which one? The J model is in lesser condition. The T model is almost like new. Both have AC supplies in them--the one in the T model might be a factory supply. The one in the J model is almost certainly homebrew. Both have the spare tubes and hex wrench where they ought to be. Both have the correct calibration books. Both were made by Zenith. 
Is there any reason to prefer one over the other except overall condition? I have not tested them yet. But it does not seem like they would be hard to get running. Is there an achilles heel in them that I should check?
Any suggestions welcome.73 de N3RHT
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