Yes, that diagram was actually created in color for "Space Seed" using existing plane fuel pump reservoir blueprints. (The black and white image comes from an old fanzine reproduction of the image.)
All the detains can be found in in article by Dr. Dave Tilotta ("alchemist") at Star Trek History:
http://www.startrekhistory.com/article4.html

All the detains can be found in in article by Dr. Dave Tilotta ("alchemist") at Star Trek History:
http://www.startrekhistory.com/article4.html
This. Mendez was simply driving the point home that "this man, who is now your second-in-command, is the same guy who served under Captain Pike and visited Talos IV thirteen years ago."First off, I think the spoken dialog in which Mendez refers to "a half-Vulcan science officer named Spock" was merely a rhetorical way of saying, this is the exact same guy as your first officer.
. . . Then I think the prop document was written with two references to that unique-to-Star-Trek phrase as an in-joke, in that it exactly quotes the dialog. It wasn't meant to be readable on TV.
No one watching the episode on 1960s TV sets would have been able to read the the text on that page. I agree, the double reference to "half-Vulcan Science Officer Spock" was probably meant as an in-joke.
Thanks, Scotpens.
Here's a little-noticed document that always looked like abstract gibberish on TV, but wasn't. Scotty's technical journal:
http://tos.trekcore.com/hd/albums/2x15hd/thetroublewithtribbleshd0449.jpg
I can't seem to find it now, but I once saw online that it's actually a Matt Jeffries drawing of a ship's phaser, colorized for this use. If I recall was like a ball-turret.
Edit: I found it. It's this, which was also used in "Space Seed" when Khan was looking at technical manuals:
http://www.trekplace.com/images/article10-pic002.jpg
Last edited: