[Test-Equipment] Need Info on Knight Signal Tracer

[Receiver]

A Knight signal tracer vintage 1963 followed me home Saturday from the 
Hamfest at the Spartanburg (SC) fairgrounds.

It's dirty on the outside, but looks very good on the inside.  I'm looking 
for a scan of the manual or a copy if one is available.  It's number is 
83Y135, says you need that if you need parts or service.  I've looked all 
through BAMA and it's mirror, but no luck so far.  Tubes test OK and at 
least five .05uf 400V papers that are leaking oil will be replaced. 
Electrolytics have reasonable P.F. for a 42 year old gadget.

TIA for any help anyone can offer or point me toward,

73, John, W4NET