You may want to check:
http://www.hnsa.org/doc/tdc/index.htm
There you'll find everything you don't want to know about the Mark 3 TDC...
It doesn't show you the labels at the machine, but it does tell you how it works
I think the book you mentioned is also derived from that manual.
THE authority IMHO is Terry Lindell who is attached to USS Pampanito. He's also the one that brought Cod's TDC back to life.
Like I said in my previous reply, I'll check for photos at home...
groetjes,