repairing a Bell Carillion 6060 Amplifier and Carillion 6070 Tuner

[vortalexfan]

Hello everyone, I'm going to be hopefully repairing for a gentleman a 1959 Bell Carillion 6060 Amplifier and Carillion 6070 Tuner in exchange for a Luxman amplifier and $200.
I was wondering what I should look out for in these old Bell Amplifiers and Tuners?

The amplifier and tuner has already been electronically restored (all of the paper caps and electrolytics have been replaced, but the repairman was a little lazy and didn't replace any of the old out of spec resistors and some other weird quirks that should of been fixed he didn't take the time to repair like a flaky balance control and some flaky output and rectifier tube sockets and a faulty Multiplex Adaptor in the tuner.)

I've been able to find the service manual for the amplifier but nothing for the matching tuner.
And the amplifier looks pretty straight forward, and the tuner I'm guessing is probably going to be similar to working on a tube radio from that time period minus the amplifier section.

thanks for your help in this matter.