If you wanted a Troughline 3 / TdeP valve decoder, this is the one.

[TheDecameron]

Remarkable condition and service history,

https://www.ebay.co.uk/itm/25560456...d=link&campid=5338728743&toolid=20001&mkevt=1

Not cheap but you get what you pay for.

 

[Avinunca]

Looks like all resistors in the tuner are original. Surely many or most will be way off their original values.