Why are we voting? the poll is 4 years old. This has either happened, or it never will.
But in fact I think I have one.
When I check, I have 1 and a bit. Page 52 of "master photography" by Michael Busselle (c) 1976 has a detailed cutaway of a Leica CL and Summicron C 40mm. Plus a Mamiya C330 TLR, a Bronica MF SLR and a Pentax KX.
Page 20 of "The 35mm Handbook" by Michael Freeman (c) 1980 has a simplified functional diagram, again of a CL. There's a fabulous AF Minolta cutaway. My copy is a 1988 reprint so maybe this was inserted later? Surely in 1980 they woudn't have been showing off their AF designs?
Perhaps someone (Roger?) can let me know whether I can post the 1976 full Leica CL cutaway?