So I'm in the library and I pick a random book off the shelf in front of me because I was there and it was there and I was done reading what I was reading and well anyway it was a compilation book of Sports Illustrated magazines and I flipped through it and discovered a two page ad for the Commodore Plus/4 in the January 7, 1985 issue on pages 8 and 9. Thought I'd relay the information to the AO crowd before I forgot it. :-)
"Commodore announces a first. Also a second, a third and a fourth." is what the large text says.