I just finished working on an old Tek 422 scope and thought you might be interested in some pictures of inside. Everything is beautifully laid out, all cable runs supported, well engineered, the tunnel diodes inside metal cans.
All it has needed was cleaning the X10 mag switch, everything else works fine. OK channel 2 variable pot might need replacing but basically that's it.
Not bad for a scope that was introduced in 1966.
Ken