Tone generators

So it looks like essentially it is the equivalent of a 3 rank highly unified instrument. There were 85 notes of "flute"

73 notes of "diapson"

And 61 notes of "Celeste"

Just inferring from the parts, there is a base sine wave generator for the flute and additional filters for the diapson and celeste

These were on 2 racks with the thousands of wire connections.  You can see the 5 octaves of Celeste, 6 of diapson and 7 of flute. 

I'm glad I live deep into the digital age!!