The manual for the Nikon D800 is 447 pages. The M3 manual is 1 sheet front and back folded. Says a lot about the changes in photography in the last 60 years. The note that is included is the way that I found it in the M3 box.
Leica M 3 manual
Leica M 3 manual opened
Leica M 3 manual fully opened
Leica M 3 notice