The schematic diagram features an interesting Apple logo that I've never seen before. I've always been told that the old-timey one on the cover of the manual was the only logo predating the six colors one with the bite out of it.

I'm thinking that was just a typeface (looks like Profil) that was available to their printer. It also shows up in the word WARRANTY in the back of the manual:

https://s3data.computerhistory.org/brochures/apple.applei.19...