PEP COMICS #27 - on newsstands March 1942
As mentioned earlier, this is all very early in the history of sequential art storytelling, so it's always interesting to see artists grow and improve story to story.
Not sure what it was between Pep Comics #26 and #27, but here in #27, Bob Montana decided to see if he could put a little 'life' into Betty's breasts. The rest, as they say, is history!
In this story, Archie becomes class president and we learn the Riverdale school colors are brown and gold.