Off topic a bit, but I used to teach a ground school class with another
instructor. He would bring two Cessna 172 Manuals to class one for a
1966 Cessna 172 and one for a 1980 Cessna 172. I don't have them in
front of me but generally here is what you would find on the 1st page
of each:

1966 Cessna 172 Manual: "Congraguations on you purchase of a brand new
Cessna 172"

1980 Cessna 172 Manual: "Warning, May cause serious Injury or Death"