Declassified, but boy -- nothing like the proposed schematic of the unit. This unit appears to have only one Phono/Tape Head preamp, whereas the schematic indicates two Tape Head Preamps. None of the power supply filter caps are located in this unit like the schematic shows, the signal switching appears at different points in the signal path, and this unit appears to be the first where Fisher used a dual triode to pass the signal of both channels through it. Interesting still, but clearly an effort to pare down with the extreme complexity of the unit shown on the schematic!
Dave