The 'newest' post-war transformer is now at least 54 years old. It is an extremely dangerous practice to operate ANY older transformer WITHOUT replacing the 110V AC power cord. This is not only a fire hazard, but the risk of potentially fatal electric shock with an old, frayed or brittle cord is drastically increased and not something to be easily dismissed.
The secondary wiring is fabric, not rubber, insulated and in good condition.
Thanks for the replies and advice Len and Malcolm. I'm a licensed master electrician so I know a thing or two about messing with old electrical equipment . Nice to know the internals are cloth insulated.
When I moved the cord I could hear and feel it cracking. It got one last shot of juice through it. Won't see current again.
Bob