I found a lone capacitor...hiding in plain sight! I am having trouble tracking it down on my diagram. The radio works despite it still being there however it appears to be tied into the push button array which I have not tested. The capacitor is tied into (from what I can tell) pin 4 and 9 of one of the front/back pieces to the bandwith dial (Push Button - Radio - Short Wave - Phono). Looking at the diagram, this appears to be "S3 Rear".
The thing that I cannot tell, is that there is nothing (in the diagram) for pin 9 on S3 Rear, however the capacitor and a wire leading to tube 12SQ7 are soldered there. My assumption, is that it was not in use so the factory used it as a junction point for the capacitor and wire from 12SQ7. If that is so, everything else would lead me to believe this is capacitor C13 (.0018) listed in the diagram. Can anyone positively identify this capacitor?