Phil Crosby a current vintageTEK volunteer discovered a new Tek Cartoon (A pinup girl in a bathing suit) in the manual of the 524AD he is refurbising for the Museum's TV Equipment Display. Unfortunately, this manual is on microfische and I cannot scan this until I find a hard copy of this manual. The manual was a 10/63 revision, but the 524AD scope was introduced much earlier.
Stan Griffiths and Bill Den Beste have been cataloging these cartoons for years, beginning with the first one I saw, the TeK Wizard on a skateboaard (W301) was found cavorting on the Vertical Output Amplifier Schematic. To date, they had found nine cartoons, with this being the tenth!
The first nine discovered can be viewed at Stan and Bill's earlier website: http://www.reprise.com/host/tektronix/humor/
We will scan the Pinup Girl and see about showing all ten on www.vintagetek.org soon.