No, see, this scene is just amazing. The costume department deserves so many kudos for this, itās unreal, especially given the fact that they pulled off Peggy pretty much flawlessly.
1) Her hair isĀ completely wrong for the 40ās. No professional/working woman Ā would have her hair loose like that. Since theyāre trying to pass this off as a military hospital, Steve would know that she would at least have her hair carefully pulled back, if maybe not in the elaborate coiffures that would have been popular.
2) Her tie? Too wide, too long. Thatās a manās tie, not a womanās. They did, however, get the knot correct as far as I can see - that looks like a Windsor.
3) That. Bra. There is so much clashing between that bra and what Steve would expect (remember, he worked with a bunch of women for a long time) that itĀ has to be intentional. Sheās wearing a foam cup, which would have been unheard of back then. Itās also an exceptionally old or ill-fitting bra - why else can you see the tops of the cups? No woman would have been caughtĀ dead with misbehaving lingerie like that back then, and the soft satin cups of 40ās lingerie made it nearly impossible anyway. Her breasts are also sitting at a much lower angle than would be acceptable in the 40ās.
Look at his eyes. He knows by the time he gets to her hair that something is very, very wrong.