Here’s the final page of the very first Spider-Man story, from AMAZING FANTASY #15. My scans of this story come from the Smithsonian, and they’re huge, so details become apparent when I blow them up really big that you probably can’t see on the smaller version I’m embedding here.
For example, there’s a third face roughed in between the two cops in Panel 5 that artist Steve Ditko chose to erase.
Similarly, in Panel 6, there’s a third face that’s half covered up by the bottom strap copy. In the margin is an erased note from Stan to Sol Brodsky that says:
SORRY ABOUT THIS—HAVE STEVE LIFT IT UP
So it seems like the cop on the right in this panel was added after the lettering was done, at the inking stage.
There’s a note by Stan by the last panel that’s partially hard to read, but what I can make out says:
THIS, TOO—LOWER SLIGHTLY.
And, at the bottom, thestrap caption was corrected to change the magazine title from AMAZING ADULT FANTASY to simply AMAZING FANTASY. The story page number, 11, was also whited out of the final panel.
Also, Spidey’s pop-eyes in Panel 4 aren’t dots, they’re actually little circles.