We had one too. I rebuilt it as best as I could, although some of the rubber parts were a bit troublesome.
One Wollensak model has a pair of 7591s, 6EU7s, (2) SE output transformers, vibration isolation dampeners for the low-level amplifiers, etc.
I saved the Westinghouse 7591s for a PP project and built a nice headphone amplifier for a friend, using the iron and some junkbox parts.
If you want to build a headphone amp, the 6T9 is a good place to start.
- Buzz