1940s-1950s
Archie Comics started in 1941.
Both images of Veronica kind of match what teenagers wore in the 1940s (i.e., skirts of varying lengths paired with a top). The top most commonly would be a blouse or a sweater; the image on the right has a tight-fit blouse whilst the one on the left shows a sweater, wich still matches the fashion then.
However, the proportions of Veronica and her clothing, plus the fishnet stockings in the second image, are more in tune with an adult rather than a teenager, something that is par for the course with the fashion in these comics up until the late 60s to 70s. Fishnet stockings in particular were worn a lot by burlesque performers of the 30s and 40s.
These selections are more in line with the changing fashion that came with the 1950s. This still utilized the "pin-up fashion" in proportion and style over what teens and young adults would more commonly wear, but the monumental style change thanks to Dan DeCarlo means that they are, at the very least, starting to look their age.
The focus with clothing at the time was on femininity and formality; so, even though women were staring to wear pants, as seen in the second image from 1952 and the second-to-last from 1958, traditionally feminine clothing was far more common. Additionally, the outfit Veronica wears in said 1952 image is doubly an outlier due to the reveal of skin. It is indicative of the fashion of high-waisted shorts and a bustier-style top. The 1958 Veronica may be wearing cigarette pants; this makes sense, as couture and straight-cut suits (both skirts and pants) became prevalent in fashion from places like Chanel. Form-fitting dresses were also growing in popularity.
The first, third, and fifth images display a combination that was incredibly popular with teenage girls at the time, that being pairing a sweater (or formal shirt) with a skirt.
However, the most major fashion component seen in Archie during this decade is with that of the poodle skirt. This garment was an icon of 50s fashion, to the point where the skirt is a staple of the decade. Poodle skirts were simple, mid-length, and circle-cut with defined waists. The skirt shows up in half of the 50s shots in this exhibit.